F. O , A. ., and O. O. “Toxicity of Copper (11) Tetraoxo Sulphate to African Catfish (Clarias Gariepinus) Fingerlings”. Asian Journal of Agriculture and Rural Development, vol. 2, no. 1, Mar. 2012, pp. 46-54, https://archive.aessweb.com/index.php/5005/article/view/499.