Köbler, F., Riedl, C., Vetter, C., Leimeister, J. M. and Krcmar, H.. "Social Connectedness on Facebook - An explorative study on status message usage." Paper presented at the meeting of the 16. Americas Conference on Information Systems (AMCIS) 2010, Lima, Peru, 2010.

Mitzlaff, Folke, Benz, Dominik, Stumme, Gerd and Hotho, Andreas. "Visit me, click me, be my friend: An analysis of evidence networks of user relationships in Bibsonomy." Paper presented at the meeting of the Proceedings of the 21st ACM conference on Hypertext and hypermedia, Toronto, Canada, 2010.