Carmela Comito Anastasios Gounaris Rizos Sakellariou Domenico Talia A service-oriented system for distributed data querying and integration on Grids. 511-524 2009 25 Future Generation Comp. Syst. 5 http://dx.doi.org/10.1016/j.future.2008.11.009 db/journals/fgcs/fgcs25.html#ComitoGST09