db/conf/cikm/SongWLLK99.html Ju-Won Song Kyu-Young Whang Young-Koo Lee Min-Jae Lee Sang-Wook Kim Transformation-Based Spatial Join. 15-26 CIKM1999/P015.pdf 1999 conf/cikm/99 CIKM http://doi.acm.org/10.1145/319950.319954 db/conf/cikm/cikm99.html#SongWLLK99