Anbulagan Extending Unit Propagation Look-Ahead of DPLL Procedure. 173-182 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3157&spage=173 2004 conf/pricai/2004 PRICAI db/conf/pricai/pricai2004.html#Anbulagan04