Rachel Matichin David Peleg Approximation Algorithm for Hotlink Assignment in the Greedy Model. 233-244 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3104&spage=233 2004 conf/sirocco/2004 SIROCCO db/conf/sirocco/sirocco2004.html#MatichinP04