Inproceedings (ls_leimeister)
Köbler, F.; Riedl, C.; Vetter, C.; Leimeister, J. M. & Krcmar, H.
Social Connectedness on Facebook - An explorative study on status message usage
2010

Inproceedings (mitzlaff2010visit)
Mitzlaff, F.; Benz, D.; Stumme, G. & Hotho, A.
Visit me, click me, be my friend: An analysis of evidence networks of user relationships in Bibsonomy
2010