@article{44721,
  author = {Alexander Barron and Nina Wurzburger and Jean Phillipe Bellenger and Joseph Wright and Anne Kraepiel and Lars Hedin},
  title = {Molybdenum limitation of asymbiotic nitrogen fixation in tropical forest soils},
  year = {2009},
  journal = {Nature Geoscience},
  volume = {2},
  number = {1},
  pages = {42{\textendash}45},
  url = {http://www.nature.com/ngeo/journal/v2/n1/abs/ngeo366.html},
  language = {eng},
}