Eshra, E. A., and O. A. Saleh. “Morphological Studies on the Gaseous Chambers of the African-Catfish (Clarias Gariepinus)”. Journal of Advanced Veterinary Research, vol. 5, no. 2, Apr. 2015, pp. 60-67, https://advetresearch.com/index.php/AVR/article/view/48.