Xiaofeng Liu Chuanbo Chen Yunsheng Liu Processing Global Nearest Neighbor Query. 458-462 2007 SNPD (1) http://doi.ieeecomputersociety.org/10.1109/SNPD.2007.432 conf/snpd/2007 db/conf/snpd/snpd2007-1.html#LiuCL07