Vasudevan, G., et al. “Effects of Mannan Oligosaccharide (MOS) and Xylo Oligosaccharide (XOS) Supplementation on the Growth Performance of Broilers”. International Journal of Livestock Research, vol. 9, no. 5, May 2019, pp. 191-8, http://ijlr.org/ojs_journal/index.php/ijlr/article/view/1278.