- Dang Van Hung, Martin Wirsing, editors, Theoretical Aspects of Computing - ICTAC 2005, Second International Colloquium, Hanoi, Vietnam, October 17-21, 2005, Proceedings. Volume 3722 of Lecture Notes in Computer Science, Springer, 2005.
- Zhiming Liu, Keijiro Araki, editors, Theoretical Aspects of Computing - ICTAC 2004, First International Colloquium, Guiyang, China, September 20-24, 2004, Revised Selected Papers. Volume 3407 of Lecture Notes in Computer Science, Springer, 2005.