Junchang, Chudapa, and Yuwares Ruangpanit. “Effects of organic zinc and manganese supplementation on eggshell quality and bone characteristic of laying hens during late laying cycle”. Agriculture and Natural Resources 57, no. 1 (February 28, 2023): 145–152. accessed April 26, 2025. https://li01.tci-thaijo.org/index.php/anres/article/view/258262.