Guang-Ho Cha Index Clustering for High-Performance Sequential Index Access. 39-51 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2973&spage=39 2004 conf/dasfaa/2004 DASFAA db/conf/dasfaa/dasfaa2004.html#Cha04