Marko Niinimäki John White Wim Som de Cerff Joni Hahkala Tapio Niemi Mikko Pitkänen Using Virtual Organizations Membership System with EDG's Grid Security and Database Access. 517-522 2004 conf/dexaw/2004 DEXA Workshops http://doi.ieeecomputersociety.org/10.1109/DEXA.2004.175 db/conf/dexaw/dexaw2004.html#NiinimakiWCHNP04