Takashi Yukawa Hiraku Amarume Yoshimi Fukumura An Important Posting Notification Function in an Intelligent Bulletin Board System for e-Learning. 761-768 2007 conf/kes/2007-3 KES (3) http://dx.doi.org/10.1007/978-3-540-74829-8_93 db/conf/kes/kes2007-3.html#YukawaAF07