Sulaiman , M.H., L. Saidu, and P.A. Abdu. “Atresia of the Left Oviduct and Abnormality of the Caecum of a 12-Month-Old Layer:A Case Report”. International Journal of Poultry Science 9, no. 9 (August 15, 2010): 920–922. Accessed September 22, 2025. https://ijpsjournal.org/index.php/ijps/article/view/1511.