Ferdinand, F.N., Kim, Y.J., Lee, H.K. and Ko, C.S. 2014. A STUDY ON COLLABORATIVE PICK-UP AND DELIVERY ROUTING PROBLEM OF LINE-HAUL VEHICLES IN EXPRESS DELIVERY SERVICES. International Journal of Industrial Engineering: Theory, Applications and Practice. 21, 6 (Oct. 2014). DOI:https://doi.org/10.23055/ijietap.2014.21.6.1264.