List of Articles Time windows Open Access Article Abstract Page Full-Text 1 - Locomotive assignment problem with train precedence using genetic algorithm Siamak Noori Seyed Farid Ghannadpour Open Access Article Abstract Page Full-Text 2 - A green vehicle routing problem with customer satisfaction criteria M. Afshar-Bakeshloo A. Mehrabi H . Safari M. Maleki F. Jolai Open Access Article Abstract Page Full-Text 3 - A mathematical model for the multi-mode resource investment problem M Sabzehparvar Open Access Article Abstract Page Full-Text 4 - A goal programming model for vehicle routing problem with backhauls and soft time windows M Aghdaghi F Jolai Open Access Article Abstract Page Full-Text 5 - A multi-criteria vehicle routing problem with soft time windows by simulated annealing R Tavakkoli-Moghaddam N Safaei M.A Shariat