1. An Overview on Vehicle Routing Problem, Journal of Information Technology FSKSM UTM, vol. 13, no. 2, December 2001.
2. Vehicle Routing Problem for Public Transport: A Case Study, International Technical Conference on System, Circuit, and Communication, Phuket, Thailand, 16-19 July 2002.
3. Sweep Algorithm in VRP for Public Transport: A Case Study in Semarang, Indonesia, International Journal of Information Technology, UKM, June 2002.
4. Evaluation of Fuzzy-based Parameters for Representing Uncertain Data, National Conference on Computer Graphic and Multimedia, Melaka, 7-9 October 2002.
5. Preliminary Study on Vehicle Routing Problem for Public Transport, MMU International Symposium on Information and Communications Technologies, August 2002.
6. Modified Sweep Algorithm for Public Bus Route Selection with Fuzzy-based Parameters, International Journal of Soft Computing, 2002.
7. Selection of Defuzzification Method to Obtain Crisp Value for Representing Uncertain Data in a Modified Sweep Algorithm, Journal of Computer Science & Technology, vol. 3, no. 2, October 2003.
8. Public Bus Route Selection using WIDI Graph Search, Journal of Media Komunikasi Teknik Sipil, vol. 11, no. 3, October 2003.
9. Ambient Intelligent, presented at the Dies Natalis of Universitas Putra Indonesia “YPTK” Padang, 5 May 2006.