M. Atzmueller, and K. Hilgenberg. Proc. 4th International Workshop on Modeling Social Media (MSM 2013), Hypertext 2013, New York, NY, USA, ACM Press, (2013)
C. Scholz, M. Atzmueller, and G. Stumme. Proc. Fourth ASE/IEEE International Conference on Social Computing (SocialCom), Boston, MA, USA, IEEE Computer Society, (2012)