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 Scientiarum. Animal Sciences, v. 36, n. 4, p. 379-384, 24 set. 2014.