Gianpiero Cabodi Paolo Camurati Luz Garcia Marco Murciano Sergio Nocco Stefano Quer Trading-Off SAT Search and Variable Quantifications for Effective Unbounded Model Checking. 1-8 2008 FMCAD http://dx.doi.org/10.1109/FMCAD.2008.ECP.30 conf/fmcad/2008 db/conf/fmcad/fmcad2008.html#CabodiCGMNQ08