1. The R*-tree: An efficient and robust access method for points and rectangles;Beckmann,1990
2. A storage and access architecture for efficient query processing in spatial database systems;Brinkhoff,1993
3. Object-Relational Database Development: A Plumber’s Guide;Brown,2001
4. Efficient evaluation of all-nearest-neighbor queries;Chen,2007
5. Enhanced nearest neighbour search on the R-tree;Cheung;ACM SIGMOD Record,1998