@misc{indiciaeea686cab2e8d,
  title = {Spatially robust estimates of biological nitrogen (N) fixation imply substantial human alteration of the tropical N cycle},
  author = {Benjamin W. Sullivan and William K. Smith and Alan R. Townsend and Megan K. Nasto and Sasha C. Reed and Robin L. Chazdon and Cory C. Cleveland},
  year = {2014},
  doi = {10.1073/pnas.1320646111},
  url = {https://pubs.usgs.gov/publication/70126043},
  note = {Source identifier: 70126043}
}