Gelareh, Shahin; Nickel, Stefan - In: Transportation Research Part E: Logistics and … 47 (2011) 6, pp. 1092-1111
In this paper we propose a 4-index formulation for the uncapacitated multiple allocation hub location problem tailored for urban transport and liner shipping network design. This formulation is very tight and most of the tractable instances for MIP solvers are optimally solvable at the root...