Wurzburger, Nina, Jean Phillipe Bellenger, Anne Kraepiel, and Lars Hedin. 2010. “COS 76-5: Mechanism of Molybdenum and Phosphorus Limitation on Asymbiotic Nitrogen Fixation in Tropical Forest Soils”. In The 95th ESA Annual Meeting. Referenced from eco.confex.com: COS 76-5: Mechanism of molybdenum and phosphorus limitation on asymbiotic nitrogen fixation in tropical forest soils.

Barron, Alexander, Nina Wurzburger, Jean Phillipe Bellenger, Joseph Wright, Anne Kraepiel, and Lars Hedin. 2009. “Molybdenum Limitation of Asymbiotic Nitrogen Fixation in Tropical Forest Soils”. Nature Geoscience 2: 42–45. Referenced from www.nature.com: Molybdenum limitation of asymbiotic nitrogen fixation in tropical forest soils.