Dorel Lucanu Eugen-Ioan Goriac Georgiana Caltais Grigore Rosu CIRC: A Behavioral Verification Tool Based on Circular Coinduction. 433-442 2009 CALCO http://dx.doi.org/10.1007/978-3-642-03741-2_30 conf/calco/2009 db/conf/calco/calco2009.html#LucanuGCR09