Zoran Stejic Yasufumi Takama Kaoru Hirota Mathematical aggregation operators in image retrieval: effect on retrieval performance and role in relevance feedback. 297-324 2005 85 Signal Processing 2 http://dx.doi.org/10.1016/j.sigpro.2004.10.003 db/journals/sigpro/sigpro85.html#StejicTH05