@article{SiegfriedZhang2023,
  author    = {Patrick Siegfried and John Jiyuan Zhang},
  title     = {Developing a sustainable concept for urban last-mile delivery},
  journal   = {Open Journal of Business and Management},
  volume    = {9},
  number    = {1},
  pages     = {268 -- 287},
  doi       = {10.4236/ojbm.2021.91015},
  year      = {2023},
}