Yoshimitsu Kudoh Makoto Haraguchi An Appropriate Abstraction for an Attribute-Oriented Induction. 43-55 http://link.springer.de/link/service/series/0558/bibs/1532/15320043.htm 1999 conf/dis/1999 Discovery Science http://link.springer.de/link/service/series/0558/bibs/1721/17210043.htm db/conf/dis/dis99.html#KudohH98