Tries for combined text and spatial data range search. - Bradford G. Nickerson; Qingxiu Shi (CCCG, 2004)

Approximate Orthogonal Range Search using Patricia Tries. - Bradford G. Nickerson; Qingxiu Shi (CCCG, 2005)

The PKD-tree for Orthogonal d-Dimensional Range Search. - Bradford G. Nickerson; Qingxiu Shi (CCCG, 2006)

K-Nearest Neighbor Search using the Pyramid Technique. - Bradford G. Nickerson; Qingxiu Shi (CCCG, 2006)

The P-list for Orthogonal Range Search. - Bradford G. Nickerson; Qingxiu Shi (SEDE, 2006)

On k-d Range Search with Patricia Tries. - Bradford G. Nickerson; Qingxiu Shi (SIAM J. Comput., 2008)