@article{article, title = {{On Optimizing a Multi-Mode Last-Mile Parcel Delivery System with Vans, Truck and Drone}}, publisher = {{MDPI AG}}, url = {{http://dx.doi.org/10.3390/electronics10202510 }}, year = {{2021}}, month = {{10}}, author = {{Wang C and Lan H and Saldanha-da-Gama F and Chen Y}}, doi = {{10.3390/electronics10202510}}, volume = {{10}}, journal = {{Electronics}}, issue = {{20}}, pages = {{2510-2510}}, note = {{Accessed on 2025/05/28}}}