国際会議: [1] Chakkrit Tantithamthavorn, Papon Yongpisanpop, Masao Ohira, Arnon Rungsawang, and Ken-ichi Matsumoto, "Chordbook: a Portable Guitar Chord Song Book Using Crowdsourcing Techniques," In Proceedings of The 2011 International Computer Science and Engineering Conference (ICSEC2011), pages 67--72, September 2011.