Steffen Lamparter Anupriya Ankolekar Rudi Studer Daniel Oberle Christof Weinhardt A policy framework for trading configurable goods and services in open electronic markets. 162-173 2006 conf/ACMicec/2006 ICEC http://doi.acm.org/10.1145/1151454.1151488 db/conf/ACMicec/icec2006.html#LamparterASOW06