Abhik Roychoudhury C. R. Ramakrishnan Unfold/Fold Transformations for Automated Verification of Parameterized Concurrent Systems. 261-290 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3049&spage=261 2004 conf/lopstr/2004lncs Program Development in Computational Logic db/conf/lopstr/lncs3049.html#RoychoudhuryR04