@misc{indiciaea840e86b195a,
  title = {The nitrogen cycle},
  author = {Stein, Lisa Y. and Klotz, Martin G.},
  year = {2016},
  doi = {10.1016/j.cub.2015.12.021},
  url = {https://www.osti.gov/biblio/1342971},
  note = {Source identifier: 1342971}
}