Sarfraz Khurshid Darko Marinov Ilya Shlyakhter Daniel Jackson A Case for Efficient Solution Enumeration. 272-286 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2919&spage=272 2003 conf/sat/2003 SAT db/conf/sat/sat2003.html#KhurshidMSJ03