国際会議
[1] Passakorn Phannachitta, Pijak Jirapiwong, Akinori Ihara, Masao Ohira, and Ken-ichi Matsumoto, "Understanding Oss Openness Through Relationship between Patch Acceptance and Evolution Pattern," In The International Workshop on Empirical Software Engineering in Practice (IWESEP2011), pages 37-42 November 2011.
[2] Mizuki Yamamoto, Masao Ohira, Yasutaka Kamei, Shinsuke Matsumoto, and Ken-ichi Matsumoto, "Temporal Changes of the Openness of an Oss Community: a Case Study of the Apache Http Server Community," In The Fifth International Conference on Collaboration Technologies 2009 (CollabTech 2009), 64 - 65 August 2009.