B. Forouraghi L. W. Schmerr G. M. Prabhu Induction of Multivariate Regression Trees for Design Optimization. 607-612 1994 conf/aaai/1994-1 AAAI db/conf/aaai/aaai94-1.html#ForouraghiSP94 http://www.aaai.org/Library/AAAI/1994/aaai94-092.php