Manolis M. Tsangaris George Kakaletris H. Kllapi Giorgos Papanikos Fragkiskos Pentaris Paul Polydoras E. Sitaridi Vassilis Stoumpos Yannis E. Ioannidis Dataflow Processing and Optimization on Grid and Cloud Infrastructures. 67-74 2009 32 IEEE Data Eng. Bull. 1 http://sites.computer.org/debull/A09mar/tsangaris.pdf db/journals/debu/debu32.html#TsangarisKKPPPSSI09