Xia Wang Manfred Hauswirth Tomas Vitvar Maciej Zaremba Semantic web services selection improved by application ontology with multiple concept relations. 2237-2242 2008 SAC http://doi.acm.org/10.1145/1363686.1364222 conf/sac/2008 db/conf/sac/sac2008.html#WangHVZ08