Wang, L.C., D.M. Hooge, C. Wen, C. Liang, T. Wang, and Y.M. Zhou. “Effects of Dietary Copper Source and Level on Growth, Organ Weights and Carcass Characteristics of Cherry Valley Meat Ducks”. International Journal of Poultry Science 9, no. 8 (July 15, 2010): 726–730. Accessed September 22, 2025. https://ijpsjournal.org/index.php/ijps/article/view/1475.