Hai-Xin Lu Yi Luo Xuemin Lin An Optimal Divide-Conquer Algorithm for 2D Skyline Queries. 46-60 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2798&spage=46 2003 conf/adbis/2003 ADBIS db/conf/adbis/adbis2003.html#LuLL03