Kazuyuki Amano Tsukuru Hirosawa Yusuke Watanabe Akira Maruoka The Computational Power of a Family of Decision Forests. 123-134 2001 conf/mfcs/2001 MFCS http://link.springer.de/link/service/series/0558/bibs/2136/21360123.htm db/conf/mfcs/mfcs2001.html#AmanoHWM01