Niramis, R. ., S. . Watanatittan, M. . Anuntkosol, T. . Rattanasuwan, and V. . Buranakitjaroen. “Retained Foreign Body in the Alimentary Tract in Children”. The Thai Journal of Surgery, vol. 21, no. 2, June 2000, pp. 41-54, https://he02.tci-thaijo.org/index.php/ThaiJSurg/article/view/243350.