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"Inapproximability and a polynomially solvable special case of a network ..."
Jianzhong Zhang, Xiaoguang Yang, Mao-cheng Cai (2004)
- Jianzhong Zhang, Xiaoguang Yang, Mao-cheng Cai:
Inapproximability and a polynomially solvable special case of a network improvement problem. Eur. J. Oper. Res. 155(1): 251-257 (2004)
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