Aleksei V. Fishkin Klaus Jansen Lorant Porkolab On Minimizing Average Weighted Completion Time of Multiprocessor Tasks with Release Dates. 875-886 2001 conf/icalp/2001 ICALP http://link.springer.de/link/service/series/0558/bibs/2076/20760875.htm db/conf/icalp/icalp2001.html#FishkinJP01