Giovanni Aloisio Massimo Cafaro Gabriele Carteni Italo Epicoco Sandro Fiore Daniele Lezzi Maria Mirto Silvia Mocavero The Grid Resource Broker portal. 1663-1670 2007 19 Concurrency and Computation: Practice and Experience 12 http://dx.doi.org/10.1002/cpe.1131 db/journals/concurrency/concurrency19.html#AloisioCCEFLMM07