Toma, Ioan; Iqbal, Kashif; Moran, Matthew; Roman, Dumitru; Strang, Thomas; Fensel, Dieter (2005): An evaluation of discouvery approaches in Grid and Web services environments. NODe 2005 – GSEM 2005. Bonn: Gesellschaft für Informatik e.V.. PISSN: 1617-5468. ISBN: 3-88579-398-9. pp. 233-247. Regular Research Papers. Erfurt. 20.-22. September 2005