Massimo Cafaro Italo Epicoco Maria Mirto Daniele Lezzi Giovanni Aloisio The Grid Resource Broker workflow engine. 1725-1739 2008 20 Concurrency and Computation: Practice and Experience 15 http://dx.doi.org/10.1002/cpe.1318 db/journals/concurrency/concurrency20.html#CafaroEMLA08