Oscar Ardaiz-Villanueva Miguel L. Bote-Lorenzo Amy W. Apon Barry Wilkinson Collaborative and learning applications of grid technology and grid education. 1 2005 conf/ccgrid/2005 CCGRID http://doi.ieeecomputersociety.org/10.1109/CCGRID.2005.1558525 db/conf/ccgrid/ccgrid2005.html#Ardaiz-VillanuevaBAW05