Dongseop Kwon Sangjun Lee Sukho Lee Efficient Update Method for Indexing Locations of Moving Objects. 643-658 2005 21 J. Inf. Sci. Eng. 3 http://www.iis.sinica.edu.tw/page/jise/2005/200505_09.html db/journals/jise/jise21.html#KwonLL05