@article{50,
  author = {Matthias Kalverkamp and Steven Young},
  title = {In support of open-loop supply chains: Expanding the scope of environmental sustainability in reverse supply chains},
  year = {2019},
  journal = {Journal of Cleaner Production},
  volume = {214},
  chapter = {573},
  doi = {10.1016/j.jclepro.2019.01.006},
}