Takeshi Okadome Yasue Kishino Takuya Maekawa Koji Kamei Yutaka Yanagisawa Yasushi Sakurai The Event Search Engine. 30-44 2010 4 IJCINI 1 http://dx.doi.org/10.4018/jcini.2010010102 db/journals/ijcini/ijcini4.html#OkadomeKMKYS10