Hai Jin Aobing Sun Ran Zheng Ruhan He Qin Zhang Ontology-based Semantic Integration Scheme for Medical Image Grid. 127-134 2007 conf/ccgrid/2007 CCGRID http://dx.doi.org/10.1109/CCGRID.2007.77 db/conf/ccgrid/ccgrid2007.html#JinSZHZ07