@article{ward2019effects,
  title = {Effects of on-demand ridesourcing on vehicle ownership, fuel consumption, vehicle miles traveled, and emissions per capita in U.S. States}
  author = {Ward, Jacob W. and Michalek, Jeremy J. and Azevedo, Inês L. and Samaras, Constantine and Ferreira, Pedro},
  journal = {Transportation Research Part C: Emerging Technologies},
  url = {https://linkinghub.elsevier.com/retrieve/pii/S0968090X18316449},
  year = {2019}
}