Khoramabadi, V.; Akbari, M. R.; Khajali, F.; Noorani, H.; Rahmatnejad, E. <B&gt;Influence of Xylanase and Vitamin A in Wheat-Based Diet on Performance, Nutrients Digestibility, Small Intestinal Morphology and Digesta Viscosity in Broiler Chickens. Acta Sci. Anim. Sci. 2014, 36, 379-384.