Robert Moll Andrew G. Barto Theodore J. Perkins Richard S. Sutton Learning Instance-Independent Value Functions to Enhance Local Search. 1017-1023 http://nips.djvuzone.org/djvu/nips11/1017.djvu 1998 conf/nips/1998 NIPS db/conf/nips/nips1998.html#MollBPS98