Mario Leandro Bertogna Eduardo Grosclaude Marcelo R. Naiouf Armando De Giusti Emilio Luque Dynamic on Demand Virtual Clusters in Grid. 13-22 2008 Euro-Par Workshops http://dx.doi.org/10.1007/978-3-642-00955-6_3 conf/europar/2008w db/conf/europar/europar2008w.html#BertognaGNGL08