00304nas a2200109   4500000000100000008004100001260002500042100002800067700001800095700002000113245006100133       2008                            d  cAprilaIschia, Italy1 aFernando Rodriguez-Haro1 aFelix Freitag1 aLeandro Navarro00aTowards QoS Provision for Virtualized Resources in Grids