On the Hardness of Approximating Some NP-optimization Problems Related to Minimum Linear Ordering Problem
2001 ◽
Vol 35
(3)
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pp. 287-309
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2004 ◽
Vol 136
(2-3)
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pp. 249-269
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Keyword(s):
2015 ◽
Vol 241
(3)
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pp. 686-696
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Keyword(s):