Martin Lukasiewycz Michael Glaß Christian Haubelt Jürgen Teich Solving Multi-objective Pseudo-Boolean Problems. 56-69 2007 conf/sat/2007 SAT http://dx.doi.org/10.1007/978-3-540-72788-0_9 db/conf/sat/sat2007.html#LukasiewyczGHT07