1. The Nitrogen Hypotheses and the English Agricultural Revolution, A Biological Analysi;Allen;Journal of Economic History,2008
2. The Evolution and Future of Earth's Nitrogen Cycle;Canfield;Science,2010
3. 2012
4. “Brot aus Luft” - Zum Mechanismus des Haber-Bosch-Verfahrens;Ertl;Akademie Journal,2003
5. Reactive Nitrogen and The World, 200 Years of Change;Galloway;Ambio,2002