Jongwan Kim SeokJin Im Sang-Won Kang Chong-Sun Hwang Spatial Indexing Based on the Semi-approximation Scheme of MBR. 369-378 2006 conf/iccsa/2006-2 ICCSA (2) http://dx.doi.org/10.1007/11751588_39 db/conf/iccsa/iccsa2006-2.html#KimIKH06