Satapathy, Debasish, Tapas Kumar Dutta, and Anupam Chatterjee. 2018. “Application and Limitations of Exogenous Fibrolytic Enzymes in Animal Nutrition”. International Journal of Livestock Research 8 (8). India:21-34. http://ijlr.org/ojs_journal/index.php/ijlr/article/view/1630.