Yuyan Chao Norimitsu Kawana Lifeng He Tsuyoshi Nakamura Hidenori Itoh R-UNSEARCHMO: A Refinement on UNSEARCHMO. 29-38 2002 conf/pricai/2002 PRICAI http://link.springer.de/link/service/series/0558/bibs/2417/24170029.htm db/conf/pricai/pricai2002.html#ChaoKHNI02