1. Abbott, P.C., Hurt, C., Tyler, W.E., 2008. What’s Driving Food Prices? Issue Report 75, Farm Foundation, Oak Brook, Illinois.
2. Paying for Agricultural Productivity;Alston,1999
3. Explaining stationary variable with non-stationary regressors;Baffes;Applied Economics Letters,1997
4. Cline, W.R., 2007. Global Warming and Agriculture: Impact Estimates by Country. Peterson Institute. ISBN: 0881324035, 9780881324037.
5. Conway, G., 2008. Confronting the Global Agricultural Crisis of the 21st Century. Presentation, World Food Prize, Des Moines, Iowa, October.