S. . Akau Hena, M. . Legbo Sonfada, A. . Danmaigoro, and A. . Bello, “Comparative weight assessment of some visceral organs in adult pigeon (columbia livia) and Japanese quail (coturnix japonica)”, Sci. J. Zool., vol. 1, no. 1, pp. 17-22, Aug. 2012.