Ioan Toma Kashif Iqbal Dumitru Roman Thomas Strang Dieter Fensel Brahmananda Sapkota Matthew Moran Juan Miguel Gómez Discovery in grid and web services environments: A survey and evaluation. 341-352 2007 3 Multiagent and Grid Systems 3 http://iospress.metapress.com/content/q1662m7748740xhk/ db/journals/mags/mags3.html#TomaIRSFSMG07