J. F. Al-maadhidi, and M. T. Al-khatib. “Digestion of Fiber and Increased Crude Protein in Corn Cob”. Journal of Madenat Alelem University College, Vol. 2, no. 2, Dec. 2010, pp. 28-29, http://116.203.176.164/index.php/JMAUC/article/view/272.