Masayuki Kozawa Mizuho Iwaihara Yahiko Kambayashi Constraint Search for Comparing Multiple-Incentive Merchandises. 152-161 2002 conf/ecweb/2002 EC-Web http://link.springer.de/link/service/series/0558/bibs/2455/24550152.htm db/conf/ecweb/ecweb2002.html#KozawaIK02