1. Grundfest, H., in Progress in Biophysics and Biophysical Chemistry, 7 (Pergamon press, New York, 1957)
2. Keynes, R. D., in The Physiology of Fishes, by Brown, M. E. (Academic Press, New York, 1956).
3. Herald, S. E., Living Fishes of the World (Doubleday and Co., Inc., Garden City, New York, 1961).