Vijay Singh, Ran, et al. “Effect of Different Levels of Nitrogen Intake on the Chemical Composition of Grain and Husk of Local and Hybrid Varieties of Oryza Sativa”. Asian Journal of Chemistry, vol. 20, no. 6, Mar. 2010, pp. 4664-72, https://asianpubs.org/index.php/ajchem/article/view/19077.