Huan Wang Xing Jiang Liang-Tien Chia Ah-Hwee Tan Ontology enhanced web image retrieval: aided by wikipedia & spreading activation theory. 195-201 2008 Multimedia Information Retrieval http://doi.acm.org/10.1145/1460096.1460128 conf/mir/2008 db/conf/mir/mir2008.html#WangJCT08