Comparative respiration of an air-breathing and a non-air-breathing characoid fish and the evolution of aerial respiration in characinsv. 51No. 3University of Chicago Press279–288
Graham, Jeffrey B., Kramer, Donald L., and Pineda, Elpidio. 1978. "Comparative respiration of an air-breathing and a non-air-breathing characoid fish and the evolution of aerial respiration in characins." Physiological Zoology, 51, (3) 279–288.