Noriaki Izumi Akira Maruyama Atsuyuki Suzuki Takahira Yamaguchi An Interoperative Environment for Developing Expert Systems. 335-340 http://dx.doi.org/10.1007/3-540-48775-1_23 1999 conf/ekaw/1999 EKAW db/conf/ekaw/ekaw1999.html#IzumiMSY99