Olivier Beaumont Pierre Ramet Jean Roman Asymptotically Optimal Algorithm for Laplace Task Graphs on Heterogeneous Platforms. 880-887 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3019&spage=880 2003 conf/ppam/2003 PPAM db/conf/ppam/ppam2003.html#BeaumontRR03