Kotaro Hashimoto Yasuhiro Suzuki Tomohiro Tanikawa Toshio Iwai Michitaka Hirose Sharelog: digital public art interaction by using "Suica". 77 2006 conf/ACMace/2006 Advances in Computer Entertainment Technology http://doi.acm.org/10.1145/1178823.1178914 db/conf/ACMace/ace2006.html#HashimotoSTIH06