D. Donato, F. Bonchi, T. Chi, und Y. Maarek. Proceedings of the 19th international conference on World wide web, Seite 321--330. New York, NY, USA, ACM, (2010)
F. Bonchi, und C. Lucchese. Proceedings of the 4th IEEE International Conference on Data Mining
(ICDM 2004), Seite 35-42. IEEE Computer Society, (2004)