Christos H. Papadimitriou David Ratajczak On a Conjecture Related to Geometric Routing. 9-17 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3121&spage=9 2004 conf/algosensors/2004 ALGOSENSORS db/conf/algosensors/algosensors2004.html#PapadimitriouR04