Yusuke Hayashi Hiroyuki Tsumoto Mitsuru Ikeda Riichiro Mizoguchi An Intellectual Genealogy Graph Affording a Fine Prospect of Organizational Learning. 10-20 2002 conf/its/2002 Intelligent Tutoring Systems http://link.springer.de/link/service/series/0558/bibs/2363/23630010.htm db/conf/its/its2002.html#HayashiTIM02