You can find the full paper here.
Bibliometric information: Mäntymäki, M. & Riemer, K. (2011) “How Social Are Social Virtual Worlds? An Investigation Of Hedonic, Utilitarian, Social And Normative Usage Drivers.”. Pacific Asia Conference on Information Systems, PACIS 2011, Quality Research in Pacific Asia, Brisbane, Queensland, Australia, 7-11 July 2011