B. Navarro Bullock, H. Lerch, A. Roßnagel, A. Hotho, und G. Stumme. Proceedings of the 11th International Conference on Knowledge Management and Knowledge Technologies, Seite 15:1--15:8. New York, NY, USA, ACM, (2011)
M. McGlohon, L. Akoglu, und C. Faloutsos. KDD '08: Proceeding of the 14th ACM SIGKDD international conference on Knowledge discovery and data mining, Seite 524--532. New York, NY, USA, ACM, (2008)