@TechReport{TomNitBierStef12,
author = {Tomáš Robenek and Nitish Umang and Michel Bierlaire and Stefan Ropke },
title = {A branch-and-price algorithm to solve the integrated berth allocation and yard assignment problem in bulk ports},
institution = {Transport and Mobility Laboratory, Ecole Polytechnique F\'ed\'erale de Lausanne},
number = {TRANSP-OR 121030},
year = {2012}
}