| web | http://www.nature.com/ncomms/2013/131217/ncomms3918/full/ncomms3918.html |
| author | Patricio Grassini, Kent M. Eskridge, & Kenneth G. Cassman |
| publication | Nature Communications |
| date | 2013-12-17 |
To visit the web page, click the title or the word "web" or the URL.