Mitzlaff, F.; Benz, D.; Stumme, G. & Hotho, A. (2010), Visit me, click me, be my friend: an analysis of evidence networks of user relationships in BibSonomy, in 'HT '10: Proceedings of the 21st ACM Conference on Hypertext and Hypermedia' , ACM, New York, NY, USA , pp. 265--270 .