Marek Wieczorek Stefan Podlipnig Radu Prodan Thomas Fahringer Bi-criteria Scheduling of Scientific Workflows for the Grid. 9-16 2008 CCGRID http://doi.ieeecomputersociety.org/10.1109/CCGRID.2008.21 conf/ccgrid/2008 db/conf/ccgrid/ccgrid2008.html#WieczorekPPF08