@article{44686,
  author = {Benjamin Houlton and Daniel Sigman and Lars Hedin},
  title = {Isotopic evidence for large gaseous nitrogen losses from tropical rainforests},
  year = {2006},
  journal = {Proceedings of the National Academy of Sciences},
  volume = {103},
  number = {23},
  pages = {8745{\textendash}8750},
  url = {http://www.pnas.org/content/103/23/8745.short},
  language = {eng},
}