Ghanbarzade, S., M.R. Chaichi, S.M.B. Hosseini, and A. Sadeghpour. 2010. “Evaluation of Nitrogen Fertilizer and Plant Density on Chemical Analysis of Corn Forage and Weed Population in an Agroforestry System”. Asian Journal of Chemistry 22 (3):2387-96. https://asianpubs.org/index.php/ajchem/article/view/11412.