Maoguo Gong Licheng Jiao Wenping Ma Shuiping Gou Solving multidimensional knapsack problems by an immune-inspired algorithm. 3385-3391 2007 IEEE Congress on Evolutionary Computation http://dx.doi.org/10.1109/CEC.2007.4424909 conf/cec/2007 db/conf/cec/cec2007.html#GongJMG07