Armstrong, P. B. 1962. Stages in the development of Ictalurus nebulosus. Syracuse University Press, New York, 8 pp., 16 pls.
Atoda, K. 1935. The larva, juvenile, and egg of the catfish, Parasilurus asotus LINNE. Zool. Mag., 47: 228-230. (In Japanese).
Haig, J. 1950. Studies on the classification of the catfishes of the oriental and palaearctic family Siluridae. Rec. Indian Mus., 48 (3/4): 59-116.
Nikol'skii, G. V. 1961. Special Ichthyology. The Israel Program for Scientific Translation, Jerusalem, 538 pp.(translated by J. I. Lengy and Z. Kranthamer into English from Russian edition, 1954).
Nikol'skii, G. V. 1964. Gyorui seitaigaku (Ecology of Fishes). Tatara-shobo, Yonago, 315 pp.(translated by K. Kamei into Japanese from Russian edition, 1963).