2I.H. Witten, E.Frank. Data Mining: Practical Machine Learning Tools and Techniques with Java Implementations [M]. Morgan Kaufmann, San Francisco, 1999.
3Y. Wang, I.H. Witten. Induction of model trees for predicting continuous classes. Proceedings of the Poster Papers of the European Conference on Machine Learning, University of Economics, Faculty of Informatics and Statistics, Prague, 1997.