Kihong Kim Sang Kyun Cha Keunjoo Kwon Optimizing Multidimensional Index Trees for Main Memory Access. 139-150 2001 SIGMOD Conference db/conf/sigmod/sigmod2001.html#KimCK01 http://doi.acm.org/10.1145/375663.375679 http://www.acm.org/sigs/sigmod/sigmod01/eproceedings/papers/Research-Kim-et-al.pdf