Magnús M. Halldórsson Guy Kortsarz Multicoloring: Problems and Techniques. 25-41 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3153&spage=25 2004 conf/mfcs/2004 MFCS db/conf/mfcs/mfcs2004.html#HalldorssonK04