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by Ding-Zhu Du; Ker-I Ko
by Du, Ding-Zhu; Wan, Peng-Jun
by Du, Ding-Zhu; Ko, Ker-I; Hu, Xiaodong
by Du, Ding-Zhu; Pardalos, Panos M.; Wu, Weili
by Du, Ding-Zhu; Pardalos, Panos M.
by Fu, Bin; Du, Ding-Zhu
by Pardalos, Panos M.; Du, Ding-Zhu; Graham, Ronald L.
by Cardei, Mihaela; Cardei, Ionut; Du, Ding-Zhu
by Du, Ding-Zhu; Smith, J. M.; Rubinstein, J. Hyam
by Jia, Xiaohua; Hu, Xiao-Dong; Du, Ding-Zhu