Akau Hena, S. ., M. . Legbo Sonfada, A. . Danmaigoro, A. . Bello, and A. . Abubakar Umar. “Some Comparative Gross and Morphometrical Studies on the Gastrointestinal Tract in Pigeon (columbia Livia) and Japanese Quail (coturnix Japonica)”. Scientific Journal of Veterinary Advances, vol. 1, no. 2, Aug. 2012, pp. 57-64, http://sjournals.com/index.php/sjva/article/view/1493.