Sanaz Mostaghim Hartmut Schmeck Distance Based Ranking in Many-Objective Particle Swarm Optimization. 753-762 2008 PPSN http://dx.doi.org/10.1007/978-3-540-87700-4_75 conf/ppsn/2008 db/conf/ppsn/ppsn2008.html#MostaghimS08