1. World Population Prospects: The Revision, Key Findings and Advance Tables;United Nations,2015
2. Enriching the Earth: Fritz Haber, Carl Bosch, and the Transformation of World Food Production;Smil,2001
3. Nitrogen cycle and world food production;Smil;World Agric.,2011
4. Transformation of the nitrogen cycle: recent trends, questions, and potential solutions;Galloway;Science,2008
5. The European Nitrogen Assessment: Sources, Effects, and Policy Perspectives;Sutton,2011