A variable neighborhood search algorithm with constraint relaxation for the two-echelon vehicle routing problem with simultaneous delivery and pickup demands
2021 ◽
2015 ◽
Vol 47
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pp. 277-284
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2012 ◽
Vol 39
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pp. 289-296
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2016 ◽
Vol 66
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pp. 163-175
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2017 ◽
Vol 272
(1-2)
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pp. 243-272
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2018 ◽
pp. 195-204
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2019 ◽
Vol 130
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pp. 537-550
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2013 ◽
Vol 12
(23)
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pp. 7137-7142
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2014 ◽
Vol 7
(3)
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pp. 299-316
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