1. Ali, M., & Byerlee, D. (2001). Productivity growth and resource degradation in Pakistan’s Punjab. In E. M. Bridges et al. (Eds.), Response to land degradation (pp. 186–199). Enfield: Science Publishers.
2. Ali, M., & Vocke, G. (2002). How wheat costs vary. Special Article. Wheat yearbook WHS-2002 (pp. 14–20). Washington: US Department of Agriculture, Economic Research Service.
3. Ammar, K., Lage, J., Villegas, D., Crossa, J., Hernandez, H., & Alvarado, G. (2008). Association among durum wheat international testing sites and trends in yield progress over the last twenty–two years. In M. P. Reynolds, J. Pietragalla, & H.-J. Braun (Eds.), International symposium on wheat yield potential: Challenges to international wheat breeding (pp. 108–119). Mexico: CIMMYT.
4. Aquino, P. (1998). The adoption of bed planting of wheat in the Yaqui Valley, Sonora, Mexico. Wheat special report no. 17A. Mexico: CIMMYT.
5. Aquino, P., & Carrión, F. (2009). Selected wheat statistics. In J. Dixon, H. J. Braun, P. Kosina, & J. Crouch (Eds.), Wheat facts and futures 2009. Mexico: International Maize and Wheat Improvement Center (CIMMYT).