国際会議
[1] Akinori Ihara, Masao Ohira, and Ken-ichi Matsumoto, "Differences of Time between Modification and Re-Modification: an Analysis of a Bug Tracking System," In 題 (booktitle) Proceedings of The 3rd International Workshop on Knowledge Collaboration in Software Development (KCSD2009), pages 17--22, November 2009.