Ashley, D, and S.S Samuel Segun. “Technical Efficiency of Catfish Production in Oyo State, Nigeria. A Case of Freshwater Culture Systems Using Data Envelopment Analysis (DEA) Approach”. Nigerian Journal of Animal Science 24, no. 1 (April 14, 2023): 108–116. Accessed April 29, 2026. https://njas.org.ng/index.php/php/article/view/577.