Satoshi Fujita Masayuki Masukawa Shigeaki Tagashira Recursive Refinement of Lower Bounds in the Multiprocessor Scheduling Problem. 201-205 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2790&spage=201 2003 conf/europar/2003 Euro-Par db/conf/europar/europar2003.html#FujitaMT03