%0 Journal Article %T Evolutionary natural frequency optimization of two‐dimensional structures with additional non‐structural lumped masses %A Zhao, Chongbin %A Steven, G.P. %A Xie, Y.M. %J Engineering Computations: International Journal for Computer-Aided Engineering and Software %V 14 %N 2 %P 233-251 %@ 0264-4401 %D 1997-03-01 %I MCB UP Ltd %~ DeepDyve