• [Wiki] https://en.wikipedia.org/wiki/Clarias.
• [fishbase] https://www.fishbase.de/summary/Clarias-ngamensis.html.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.
• [WillTwed1978] Willoughby, W. and Tweddle, D. (1978). The ecology of the catfish, Clarias gariepinus and Clarias ngamensis in the Shire Valley, Malawi. J. Zool., 186(4):507--534.