A space-partitioning-based indexing method for multidimensional non-ordered discrete data spaces.

Gang Qian Qiang Zhu Qiang Xue Sakti Pramanik A space-partitioning-based indexing method for multidimensional non-ordered discrete data spaces. 79-110 2006 24 ACM Trans. Inf. Syst. 1 http://doi.acm.org/10.1145/1125860 db/journals/tois/tois24.html#QianZXP06