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Acta Mathematicae Applicatae
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Acta Mathematicae Applicatae Sinica, English Serie  2017, Vol. 33 Issue (4): 1015-1024    DOI: 10.1007/s10255-017-0714-x
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An Improved Approximation Algorithm for the k-Level Facility Location Problem with Soft Capacities
Chen-chen WU1, Da-chuan XU2,
1 College of Science, Tianjin 300384, China;
2 Department of Information and Operations Research, College of Applied Sciences, Beijing University of Technology, Beijing 100124, China

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