Micah Adler Ying Gong Arnold L. Rosenberg On "Exploiting" Node-Heterogeneous Clusters Optimally. 465-487 2008 42 Theory Comput. Syst. 4 http://dx.doi.org/10.1007/s00224-007-9001-1 db/journals/mst/mst42.html#AdlerGR08