Sanyou Y. Zeng Guang Chen Rui Wang Hui Li Hui Shi Lixin Ding Lishan Kang A new technique for assessing the diversity of close-Pareto-optimal front. 344-349 2008 IEEE Congress on Evolutionary Computation http://dx.doi.org/10.1109/CEC.2008.4630820 conf/cec/2008 db/conf/cec/cec2008.html#ZengCWLSDK08