C. Scholz, M. Atzmueller, M. Kibanov, and G. Stumme. Advances in Social Networks Analysis and Mining (ASONAM), 2013 International Conference on, Los Alamitos, CA, USA, (2013)
R. Jäschke, and S. Rudolph. Contributions to the 11th International Conference on Formal Concept Analysis, page 19--34. Technische Universität Dresden, (May 2013)