My Publications

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Here you can find some of the stuffs I’ve written. Some of these are in Bahasa Indonesia, but most of them are in English. Which is which? Well, usually the titles offer enough hints. Currently I am not going to offer PDF file downloads of the materials, due to copyright issues. However, you may be able to download them legally elsewhere (IEEE, SPIE, etc.).

Book/Book Chapters

  1. I. Setyawan, Dasar-dasar Machine Vision (Introduction to Machine Vision), Widya Sari Press, Salatiga, 2012, ISBN: 978-979-1098-08-3

Journals

  1. Y. Saragih, I. Setyawan, E. Sediyono, R.M.Z. Lawang, Evaluation of Government Policy and Analysis of Quality Mobile Communications Network of FWA-CDMA with Low Cost for Rural Areas in Indonesia, ARPN Journal of Engineering and Applied Sciences, Vol. 12, No. 7, pp. 2235 — 2241, ISSN: 1819-6608

  2. Y. Saragih, I. Setyawan, E. Sediyono, R.M.Z. Lawang, Kebijakan Pemerintah tentang Kelayakan Fixed-Wireless Access-CDMA (FWA-CDMA) untuk Komunikasi Murah di Pedesaan, Jurnal Ilmu dan Aplikasi Teknik Barometer, Vol. 2, No. 1, 2017, ISSN: 2549-9041

  3. Y. Saragih, R.M.Z. Lawang, I. Setyawan, E. Sediyono, Potensi FWA (Fixed Wireless Access)-CDMA Mendukung Program Pemerintah Indonesia dalam Wilayah USO (Universal Service Obligation), JREC Journal of Electrical and Electronics, Vol. 4, No. 2, 2016, pp. 86 — 95, ISSN: 2302-5883

  4. E. Anggriyono, I. Setyawan, I.K. Timotius, Pemanfaatan Metode Template Matching untuk Face Tracking secara Real Time di Ruang Tertutup, Jurnal Ilmiah Techné, Vol. 14, No. 2, 2015, pp. 147—156, ISSN: 1412-8292

  5. K. Widiyoko and I. Setyawan, Perbandingan Penggunaan Mean Lokal, Median Lokal dan Invarians Statistik Koefisien DCT dalam Perancangan Image Hashing, Jurnal Ilmiah Techné, Vol. 13, No. 2, 2014, pp. 205—212, ISSN: 1412-8292

  6. K.W. Halauw, I. Setyawan and F.D. Setiaji, Sistem Pengoreksi Lembar Jawab Pilihan Ganda berbasis Citra menggunakan Webcam, Jurnal Cybermatika, Vol. 2, No. 1, 2014, pp. 7—12, ISSN:2338-6525

  7. D. Christian, I.K. Timotius and I. Setyawan, Sistem Pengenal Arah Pandang Mata pada Pengendara Mobil, Jurnal Ilmiah Techné, Vol. 13, No. 1, 2014, pp. 29—35, ISSN: 1412-8292

  8. J.K. Chandra, I.K. Timotius and I. Setyawan, Sistem Pendeteksi Orang Tergeletak berbasis sebuah Kamera Pengawas dengan menggunakan metode Template Matching, Jurnal Cybermatika, Vol. 1, No. 2, 2013, pp. 1—5, ISSN: 2338-6525

  9. T.L. Hartono, F.D. Setiaji and I. Setyawan, Alat Bantu Analisis Heart Rate Variability, Jurnal Ilmiah Techné, Vol. 12,  No. 2, 2013, pp. 141—157, ISSN: 1412-8292

  10. H. Setiawan, I. Setyawan and S. Nugroho, Implementasi Penterjemah Kode Isyarat Tangan menggunakan Analisis Deteksi Tepi pada ARM11 OK6410B, Jurnal Ilmiah Techné, Vol. 12,  No. 2, 2013, pp. 159—166, ISSN: 1412-8292

  11. A.A.D. Ridwan, I.K. Timotius and I. Setyawan, Pengenalan Gender memanfaatkan Wajah Manusia dengan menggunakan Metode Klasifikasi Nearest Neighbor, Jurnal Ilmiah Techné, Vol. 12,  No. 1, 2013, pp. 45—51, ISSN: 1412-8292

  12. R. Lionnie, I.K. Timotius and I. Setyawan, Performance Comparison of Several Pre-Processing Methods in a Hand Gesture Recognition System based on Nearest Neighbor for Different Background Conditions, ITB Journal of Information and Communication Technology, Vol. 6, No. 3, 2012, pp. 183—194, ISSN:1978-3086

  13. I. Setyawan and I.K. Timotius, A Frontal and Profile Face Detection System using a Modified Schneiderman-Kanade Method, Radiomatics Journal on Communications Engineering, Vol. 3, No. 1, 2012, pp. 34—40, ISSN: 1693-5152

  14. K. Ananta, I. Setyawan and I.K. Timotius, Pengaruh Pemakaian Edge Detection pada Sistem Pengenalan Huruf Kapital Tulisan Tangan, Jurnal Teknik dan Ilmu Komputer, Vol. 1, No. 3, 2012, pp. 257—264, ISSN: 2089-3647

  15. E. Royce, I.K. Timotius and I. Setyawan, Sistem Pendeteksi Senyum berdasarkan Metode Edge Detection, Histogram Equalization dan Nearest Neighbor, Jurnal Ilmiah Techné, Vol. 11,  No. 1, 2012, pp. 75—82, ISSN: 1412-8292

  16. I. Setyawan, I.K. Timotius and A.A. Febrianto, Frontal Face Detection using Haar Wavelet Coefficients and Local Histogram Correlation, ITB Journal of Information and Communication Technology, Vol. 5, No. 3, 2011, pp. 161—176, ISSN:1978-3086

  17. I. Setyawan and I.K. Timotius, A Frontal Pose Face Detection and Classification System based on Haar Wavelet Coefficients and Support Vector Machine, International Journal of Information and Electronics Engineering, Vol. 1, No. 3, 2011, pp. 276—280, ISSN:2010-3719

  18. R. Lionnie, I. Setyawan, I.K. Timotius, Penggunaan Transformasi Wavelet dalam Sistem Pengenalan Isyarat Tangan dengan Beberapa Kombinasi Pra Proses, Jurnal Ilmiah Techné, Vol. 10, No. 2, 2011, pp. 125—136, ISSN: 1412-8292

  19. I.K. Timotius, I. Setyawan, and A.A. Febrianto, Two-Class Classification with Various Characteristics based on Kernel Principal Component Analysis and Support Vector Machines, Makara Seri Teknologi, Vol. 15, No. 1, pp. 96—100, April 2011, ISSN: 1693-6698

  20. I. Setyawan, Perceptual Quality of Geometrically Distorted Images, Part II: Human Perception of the  Quality of Geometrically Distorted Images, Jurnal Ilmiah Techné, Vol. 9, No. 1, 2010, pp. 13—39, ISSN:1412-8292

  21. I.K. Timotius, I. Setyawan, A.A. Febrianto, Face Recognition between Two Person using Kernel Principal Component Analysis and Support Vector Machines, International Journal on Electrical Engineering and Informatics, Vol.2, No. 1, 2010, pp. 53 – 61, ISSN:2085-6830

  22. I. Setyawan, Perceptual Quality of Geometrically Distorted Images Part I: The Homogeneity-based Perceptual Quality Measurement (HPQM), Jurnal Ilmiah Techné, Vol. 8, No. 2, 2009, pp. 59 – 76, ISSN:1412-8292

  23. Y. Santoso, I. Setyawan, V.N. Papilaya, Penerapan Kamera Web sebagai Pendeteksi Gerakan dengan Antar Muka DirectShow, Jurnal Makara UI, Vol. 13, No. 1, 2009, pp. 15—18, ISSN:1693-6698

  24. 24.I. Setyawan, Improving Watermark Robustness against Geometric Transformation Attack, Jurnal Ilmiah Techné, Vol. 8, No. 1, 2009, pp. 31 – 57, ISSN:1412-8292

  25. I. Setyawan, A. Dharmalim, Reversible Data Hiding, Jurnal Ilmiah Techné, Vol. 7, No. 1, 2008, pp. 15—33, ISSN:1412-8292

  26. I. Setyawan, D. Utomo, Senfrie, Aplikasi Presentasi menggunakan Penggerak Kursor dengan Kamera Video sebagai Perangkat Masukan, Jurnal Ilmiah Techné, Vol. 6, No. 2, 2007, pp. 71—86, ISSN:1412-8292

  27. I. Setyawan, A Digital Watermarking Application: Watermarking Low Bit-rate MPEG Video, Jurnal Ilmiah Techné, Vol. 5, No. 2, 2006, pp. 53—68, ISSN:1412-8292

  28. I. Setyawan, An Introduction to Digital Watermarking, Jurnal Ilmiah Techné, Vol. 4, No. 1, 2005, pp. 1—17, ISSN:1412-8292

  29. G.C. Langelaar, I. Setyawan, R.L. Lagendijk, Watermarking Digital Image and Video Data: A State-of-the-Art Overview, IEEE Signal Processing Magazine, September 2000, Vol. 17, No. 5, ISSN 1053-5888, pp. 20-46

Conference Proceedings

  1. M.A. Suwignyo, I. Setyawan, B.W. Yohanes, Parking Space Detection using Quaternionic Local Ranking Binary Pattern, Proc. 3rd International Seminar on Application for Technology of Information and Communication (iSemantic 2018), Semarang, September 21—22, 2018, pp. 351—355

  2. B.W. Yohanes, R.D. Airlangga, I. Setyawan, Real Time Face Recognition Comparison using Fisherfaces and Local Binary Pattern, Proc. 4th International Conference on Science and Technology (ICST 2018), Yogyakarta, August 7—8, 2018

  3. A. Cornelia, I. Setyawan, G. Dewantoro, Face Anti-spoofing Method based on Quaternionic Local Ranking Binary Pattern Features, Proc. 2nd International Conference on Signal and Systems (ICSigSys 2018), Bali, May 1—3, 2018

  4. G. Damanik, I. Setyawan, R. Lawang, D.D. Kameo, Sattelite Deployment Strategy for an Archipelagic State: The Case of Indonesia, Proc. 11th International Conference on Telecommunication Systems, Services and Applications (TSSA 2017), Lombok, October 26—27, 2017, pp. 1—6

  5. A. Cornelia, I. Setyawan, Ball Detection Algorithm for Robot Soccer based on Contour and Gradient Hough Circle Transform, Proc. 4th International Conference on Information Technology, Computer and Electrical Engineering (ICITACEE 2017), Semarang, October 18—19, 2017, pp. 132—137

  6. S.B.W.T. Hatmaja, S. Nugroho, I. Setyawan, Stationary Obstacle Detection using Pyramidal Lucas Kanade Optical Flow, Proc. 15th International Conference on Quality in Research (QiR 2017), Nusa Dua, July 24—27 2017, pp. 474—478

  7. G. Damanik, I. Setyawan, D. Kameo, Satellite Deployment through Two-layer Model to Solve National Supply and Demand Gap of Capacity in Indonesia, Proc. 2nd International Conference on Wireless and Telematics (ICWT 2016), Yogyakarta, August 1—2, 2016, pp. 31—35

  8. I. Setyawan, I.K. Timotius and M. Kalvin, Automatic Batik Motifs Classification using Various Combinations of SIFT Features Moments and k-Nearest Neighbor, Proc. 7th International Conference on Information Technology and Electrical Engineering (ICITEE 2015), Chiang Mai, October 29—30, 2015, pp. 269—274

  9. I. Setyawan and I.K. Timotius, Spatio-Temporal Digital Video Hashing using Edge Orientation Histogram and Discrete Cosine Transform, International Conference on Information Technology Systems and Innovation (ICITSI 2014), Bandung, November 2014, pp. 111—115

  10. I.K. Timotius and I. Setyawan, Using Edge Orientation Histograms in Face-based Gender Classification, International Conference on Information Technology Systems and Innovation (ICITSI 2014), Bandung, November 2014, pp. 93—98

  11. E. Royce, I. Setyawan and I.K. Timotius, Smile Recognition System based on Lip Corners Identification, Proc. 1st International Conference on Information Technology, Computer and Electrical Engineering (ICITACEE 2014), Semarang, November 8, 2014, pp. 221—224

  12. B.S. Prakoso, I.K. Timotius and I. Setyawan, Palmprint Identification for User Verification based on Line Detection and Local Standard Deviation, Proc. 1st International Conference on Information Technology, Computer and Electrical Engineering (ICITACEE 2014), Semarang, November 8, 2014, pp. 153—157

  13. I. Setyawan and I.K. Timotius, Digital Image Hashing using Local Histogram of Oriented Gradients, Proc. 6th International Conference on Information Technology and Electrical Engineering (ICITEE 2014), Yogyakarta, October 7—8, 2014, pp. 75—78

  14. I.K. Timotius and I. Setyawan, Evaluation of Edge Orientation Histograms in Smile Detection, Proc. 6th International Conference on Information Technology and Electrical Engineering (ICITEE 2014), Yogyakarta, October 7—8, 2014, pp. 85—89

  15. I. Setyawan and I.K. Timotius, Content-dependent Spatio-Temporal Video Watermarking using 3-Dimensional Discrete Cosine Transform, Proc. 5th International Conference on Information Technology and Electrical Engineering (ICITEE 2013), Yogyakarta, October 7—8, 2013, pp. 79—83

  16. I.K. Timotius and I. Setyawan, Using Estimated Arithmetic Means of Accuracies to Select Features for Face-based Gender Classification, Proc. 5th International Conference on Information Technology and Electrical Engineering (ICITEE 2013), Yogyakarta, October 7—8, 2013, pp. 242—247

  17. H. Setiawan, I. Setyawan and S. Nugroho, Hand Gesture Recognition using Optimized Neural Network Shape Fitting on ARM11, Proc. 5th International Conference on Information Technology and Electrical Engineering (ICITEE 2013), Yogyakarta, October 7—8, 2013, pp. 131—136

  18. I. Setyawan and I.K. Timotius, Content-dependent Image Watermarking using Local Gray-Level Co-occurrence Matrix Texture Features, Proc. 2nd Int. Conference on Control, Systems & Industrial Informatics (ICCSII 2013), Bandung, June 23—26, 2013, pp. 95—98, ISBN: 978-1-4673-5816-3

  19. A.A.D. Ridwan, I. Setyawan and I.K. Timotius, Performance Comparison between Principal Component Analysis and Linear Discriminant Analysis in a Gender Recognition System, Proc. 2nd Int. Conference on Control, Systems & Industrial Informatics (ICCSII 2013), Bandung, June 23—26, 2013, pp. 105—109, ISBN: 978-1-4673-5816-3

  20. I. Setyawan and I.K. Timotius, Facial Region Watermarking Robust against Rotation, Scaling and Translation Attacks, Proc. SPIE 8768, 4th International Conference on Graphic and Image Processing (ICGIP 2012), 876837, Singapore, October 5—7, 2012, ISBN: 978-0-8194-9566-2

  21. I.K. Timotius and I. Setyawan, Hand Gesture Recognition Based on Motion History Images for a Simple Human-Computer Interaction System, Proc. SPIE 8768, 4th International Conference on Graphic and Image Processing (ICGIP 2012), 87684M, Singapore, October 5—7, 2012, ISBN: 978-0-8194-9566-2

  22. I. Setyawan, A.F. Putra, I.K. Timotius, and A.A. Febrianto, Face Recognition using Kernel Fisher’s Discriminant Analysis and Nearest Neighbor, International Conference on Telematics System, Services, and Application (TSSA 2011), Denpasar, October 20—21, 2011, pp. 8—10, ISBN: (CD) 978-1-4673-0180-0 (Proc) 978-1-4577-1440-5

  23. I.K. Timotius, T.C. Linasari, I. Setyawan, and A. A. Febrianto, Face Recognition using Support Vector Machines and Generalized Discriminant Analysis, International Conference on Telematics System, Services, and Application (TSSA 2011), Denpasar, October 20—21, 2011, pp. 5—7, ISBN: (CD) 978-1-4673-0180-0 (Proc) 978-1-4577-1440-5

  24. I. Setyawan, Y. Wibowo, I.K. Timotius, and A.A. Febrianto, A Human Face Detection System Based on Schneiderman-Kanade Method, International Conference on Telematics System, Services, and Application (TSSA 2011), Denpasar, October 20—21, 2011, pp. 1—4, ISBN: (CD) 978-1-4673-0180-0 (Proc) 978-1-4577-1440-5

  25. I. Setyawan, I.K. Timotius, A.A. Febrianto, A Face Detection and Classification System using Haar Wavelet Coefficients and Support Vector Machine, Proceedings of the 1st International Conference on Signal and Information Processing (ICSIP), Singapore, October 14—15, 2011, pp.577—581, ISBN: 978-0-7918-5984-1

  26. R. Lionnie, I.K. Timotius, I. Setyawan, An Analysis of Edge Detection as a Feature Extractor in a Hand Gesture Recognition System based on Nearest Neighbor, Proceedings of the 3rd International Conference on Electrical Engineering and Informatics (ICEEI 2011), 2011, Bandung, Indonesia, pp. 886—889, ISBN: 978-1-4577-0750-6

  27. I. Setyawan, I.K. Timotius, A.A. Febrianto, Face Detection System using 1-dimensional Haar Wavelet Transform Coefficients, Proceedings of the 6th International Conference on Information & Communication Technology and Systems, Surabaya, September 28, 2010,  pp. VI-35 – VI-40, ISSN:2085-1944

  28. I. Setyawan, A.A. Febrianto, I.K. Timotius, Perceptual Quality Evaluation of the Seam Carving Method,  Proceedings of the 6th International Conference on Information & Communication Technology and Systems, Surabaya, September 28, 2010, pp. VI-41 – VI-46, ISSN:2085-1944

  29. T.C. Linasari, I. Setyawan, I.K. Timotius, A.A. Febrianto, An Implementation of Support Vector Machines and Generalized Discriminant Analysis on Iris and Hepatitis Datasets, Proceedings of the 6th International Conference on Information & Communication Technology and Systems, Surabaya, September 28, 2010, pp. VI-47 – VI-52, ISSN:2085-1944

  30. I.K. Timotius, I. Setyawan, A.A. Febrianto, Face Recognition for Group Classification based on Kernel Principal Component Analysis and Support Vector Machines, Proceedings of the 6th International Conference on Information & Communication Technology and Systems, Surabaya, September 28, 2010, pp. VI-53 – VI-56, ISSN:2085-1944

  31. D. Santoso, D. Utomo, I. Setyawan, Rekayasa Alat Pendeteksi Aliran Darah dengan Prinsip Doppler untuk Operasi Wasir dengan Teknik DG-HAL,  Prosiding Seminar Nasional Teknologi Industri, 2010, Universitas Trisakti, Jakarta

  32. I. K. Timotius, I. Setyawan, A. A. Febrianto, An Implementation of Support Vector Machines on Iris Data Set, Proceedings of The 5th International Conference on Telematics System, Services and Applications, Bandung, 2009, pp 39—41, ISSN:1693-993x

  33. I. Setyawan, R.L. Lagendijk, Perceptual Quality Impact of Geometric Distortions in Images, in the Proceedings of the Twenty-Fifth Symposium on Information Theory in the Benelux, Kerkrade, The Netherlands, 2004

  34. I. Setyawan, R.L. Lagendijk, Human Perception of Geometric Distortions in Images, in the Proceedings of SPIE, Security, Steganography and Watermarking of Multimedia Contents VI, Vol. 5306, San Jose, USA, 2004

  35. J. Lichtenauer, I. Setyawan, R.L. Lagendijk, Hiding Correlation-Based Watermark Templates using Secret Modulation, in the Proceedings of SPIE, Security, Steganography and Watermarking of Multimedia Contents VI, Vol. 5306, San Jose, USA, 2004

  36. I. Setyawan, D. Delannay, B. Macq, R.L. Lagendijk, Perceptual Quality Evaluation of Geometrically Distorted Images using Relevant Geometric Transformation Modeling, in the Proceedings of SPIE, Security and Watermarking of Multimedia Contents V, Vol. 5020, Santa Clara, USA, 2003, pp. 85-94

  37. J. Lichtenauer, I. Setyawan, R.L. Lagendijk, T. Kalker, Exhaustive Geometrical Search and the False Positive Watermark Detection Probability, in the Proceedings of SPIE, Security and Watermarking of Multimedia Contents V, Vol. 5020, Santa Clara, USA, 2003, pp. 203-214

  38. P.J.O. Doets, I. Setyawan, R.L. Lagendijk, Complexity-Scalable Compensation of Geometrical Distortions in Image Watermarking, in the Proceedings of ICIP 2003, Barcelona, Spain, 2003

  39. I. Setyawan, D. Delannay, B. Macq, R.L. Lagendijk, Assessing the Visual Quality of Geometrically Distorted Images, in the Proceedings of the Ninth Annual Conference of the Advanced School in Computing and Imaging, Heijen, The Netherlands, 2003, pp. 93-100

  40. J. Lichtenauer, I. Setyawan, R.L. Lagendijk, T. Kalker, False Positive Watermark Detection Behavior in Exhaustive Geometrical Searches, in the Proceedings of the Ninth Annual Conference of the Advanced School in Computing and Imaging, Heijen, The Netherlands, 2003, pp. 238-245

  41. P.J.O. Doets, I. Setyawan, R.L. Lagendijk, Spatial Resynchronization in Image Watermarking using Complexity-scalable Transformations, in the Proceedings of the Ninth Annual Conference of the Advanced School in Computing and Imaging, Heijen, The Netherlands, 2003, pp. 35-42

  42. D. Delannay, I. Setyawan, R.L. Lagendijk, B. Macq, Relevant Modeling & Comparison of Geometric Distortions in Watermarking Systems, in the Proceedings of SPIE, Application of Digital Image Processing XXV, Vol. 4790, Seattle, USA, 2002, pp. 200-210

  43. I. Setyawan, G. Kakes, R.L. Lagendijk, Synchronization-insensitive Video Watermarking using Structured Noise Pattern, in the Proceedings of SPIE, Security and Watermarking of Multimedia Contents IV, Vol. 4675, San Jose, USA, 2002, pp. 520-529

  44. I. Setyawan, G. Kakes, R.L. Lagendijk, Video Watermarking using Coloured Noise Pattern Insensitive to Spatial Synchronization, in the Proceedings of the Eighth Annual Conference of the Advanced School in Computing and Imaging, Lochem, The Netherlands, 2002, pp. 186-193

  45. I. Setyawan, R.L. Lagendijk, Extended Differential Energy Watermarking (XDEW) algorithm for low bit-rate video watermarking, in the Proceedings of the Seventh Annual Conference of the Advanced School in Computing and Imaging, Heijen, The Netherlands, 2001, pp. 202-209

  46. I. Setyawan, R.L. Lagendijk, Low bit-rate video watermarking using temporally extended Differential Energy Watermarking (DEW) algorithm, In the Proceedings of SPIE, Security and Watermarking of Multimedia Contents III, Vol. 4314, 2001, pp. 73-84

Thesis & Technical Reports

  1. I. Setyawan, Geometric Distortion in Image and Video Watermarking: Robustness and Perceptual Quality Impact, Ph.D. thesis, Technische Universiteit Delft, ISBN: 90-9017826-0, 135 pp., 2004, R.L. Lagendijk, advisor

  2. R.L. Lagendijk, I. Setyawan, Digital Watermark Benchmarking: Requirements and Technical Issues, Technical Report, Information and Communication Theory Group, Tecnische Universiteit Delft, 2000

  3. I. Setyawan, Attacks on Watermarking Systems, Technical Report, Information and Communication Theory Group, Technische Universiteit Delft, 2000

  4. I. Setyawan, Pengkodean Video dengan Laju Bit Rendah menggunakan Encoder H.263 yang Dimodifikasi (Low Bit-rate Video Coding using a Modified H.263 Encoder), Master’s Thesis, Institut Teknologi Bandung, 1999, S. Tjondronegoro, advisor

  5. I. Setyawan, Pengenalan Bunyi Alat Musik menggunakan Jaringan Syaraf Tiruan Model Self-Organizing Map (Sound-based Recognition of Musical Instruments using Artificial Neural Networks), Final Project, Institut Teknologi Bandung, 1996, K. Sumintapura & Albarda, advisors

Magazines

  1. I. Setyawan, Digital Watermarking: A Picture can Hide a Thousand Words, BERSAINS, Volume 1 (2016), pp. 19—26, ISSN: 2477-8567

  2. I. Setyawan, Membuat Animasi pada File PDF menggunakan LaTeX, InfoLinux Edisi 05/2009, Mei 2009, pp. 54—60

  3. I. Setyawan, Membuat Gambar dalam Dokumen LaTeX menggunakan Paket TGF/TikZ, InfoLinux Edisi 12/2008, Desember 2008, pp. 58—63

  4. I. Setyawan, Presentasi menggunakan LaTeX dan PowerDot, InfoLinux Edisi 03/2008, Maret 2008, pp. 58—62