@article{stoll2019the,
  title = {The Carbon Footprint of Bitcoin}
  author = {Stoll, Christian and Klaaßen, Lena and Gallersdörfer, Ulrich},
  journal = {Joule},
  url = {https://doi.org/10.1016/j.joule.2019.05.012},
  year = {2019}
}