@article { correia2010, title = {Single-assignment hub location problems with multiple capacity levels}, journal = {Transportation Research Part B: Methodological}, volume = {44}, number = {8-9}, year = {2010}, note = {

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}, pages = {1047-1066}, abstract = {

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}, author = {Correia, Isabel and Nickel, Stefan and Francisco Saldanha-da-Gama} }