Seok Il Song Young Ho Kim Jae Soo Yoo An Enhanced Concurrency Control Scheme for Multidimensional Index Structures. 97-111 2004 16 IEEE Trans. Knowl. Data Eng. 1 http://csdl.computer.org/comp/trans/tk/2004/01/k0097abs.htm db/journals/tkde/tkde16.html#SongKY04