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)
Z. Li, B. Ding, J. Han, R. Kays, and P. Nye. Proceedings of the 16th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, page 1099--1108. New York, NY, USA, ACM, (2010)
Y. Ye, Y. Zheng, Y. Chen, J. Feng, and X. Xie. International Conference on Mobile Data Management: Systems, Services and Middleware (MDM), page 1--10. IEEE, (2009)
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)