F. Giannotti, M. Nanni, F. Pinelli, and D. Pedreschi. International Conference on Knowledge Discovery and Data Mining (SIGKDD), page 330--339. New York, NY, USA, ACM, (2007)
F. Lemmerich, M. Becker, and M. Atzmueller. European Conference on Machine Learning and Knowledge Discovery in Databases, page 277--292. Berlin, Heidelberg, Springer Berlin Heidelberg, (2012)