Margarita Reyes Sierra Carlos A. Coello Coello A study of fitness inheritance and approximation techniques for multi-objective particle swarm optimization. 65-72 2005 conf/cec/2005 Congress on Evolutionary Computation http://dx.doi.org/10.1109/CEC.2005.1554668 db/conf/cec/cec2005.html#SierraC05