David L. J. U. Enthoven, Bolor Jargalsaikhan, Kees Jan Roodbergen, Michiel A. J. uit het Broek, Albert H. Schrotenboer. The two-echelon vehicle routing problem with covering options: City logistics with cargo bikes and parcel lockers. Computers & OR, 118:104919, 2020. [doi]
Abstract is missing.