Urban phosphorus sustainability: Systemically incorporating social, ecological, and technological factors into phosphorus flow analysis

Environmental Science & Policy, Volume 47, March 2015, Pages 1-11
Geneviève S. Metson, David M. Iwaniec, Lawrence A. Baker, Elena M. Bennett, Daniel L. Childers, Dana Cordell, Nancy B. Grimm, J. Morgan Grove, Daniel A. Nidzgorski, Stuart White
http://www.sciencedirect.com/science/article/pii/S146290111400197X