1. Skip graphs;Aspnes,2003
2. Swam: a family of access methods for similarity-search in peer-to-peer data networks;Banaei-Kashani,2004
3. Similarity grid for searching in metric spaces;Batko,2005
4. The R*-tree: an efficient and robust access methods for points and rectangles;Beckmann,1990
5. Multidimensional Binary Search Trees Used for Associative Searching;Bentley;Communications of the ACM,1975