James Ostrowski Jeff Linderoth Fabrizio Rossi Stefano Smriglio Constraint Orbital Branching. 225-239 2008 IPCO http://dx.doi.org/10.1007/978-3-540-68891-4_16 conf/ipco/2008 db/conf/ipco/ipco2008.html#OstrowskiLRS08