C. Lampe, N. Ellison, and C. Steinfield. Proceedings of the 2006 20th anniversary conference on Computer supported cooperative work, page 167--170. New York, NY, USA, ACM, (2006)
C. Lampe, J. Vitak, R. Gray, and N. Ellison. Proceedings of the 2012 ACM annual conference on Human Factors in Computing Systems, page 3195--3204. New York, NY, USA, ACM, (2012)