Sangyong Hwang Keunjoo Kwon Sang Kyun Cha Byung Suk Lee Performance Evaluation of Main-Memory R-tree Variants. 10-27 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2750&spage=10 2003 conf/ssd/2003 SSTD db/conf/ssd/sstd2003.html#HwangKCL03