The Approximate Well-Founded Semantics for Logic Programs with Uncertainty.

Yann Loyer Umberto Straccia The Approximate Well-Founded Semantics for Logic Programs with Uncertainty. 541-550 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2747&spage=541 2003 conf/mfcs/2003 MFCS db/conf/mfcs/mfcs2003.html#LoyerS03