Per Bjesse James H. Kukula Robert F. Damiano Ted Stanion Yunshan Zhu Guiding SAT Diagnosis with Tree Decompositions. 315-329 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2919&spage=315 2003 conf/sat/2003 SAT db/conf/sat/sat2003.html#BjesseKDSZ03