Anyetullah , Janat, and Ziauddin Zia. “The Effects of Different Levels of Dietary Metabolizable Energy and Copper-Methionine Supplementation on the Performance of Laying Hens”. Journal of Natural Sciences – Kabul University, vol. 7, no. Special.Issue, Nov. 2024, pp. 113-30, doi:10.62810/jns.v7iSpecial.Issue.93.