Tiwari, Devendra Prasad. 2018. “Comparative Growth Performance and Nutrient Utilization in Commercial Broiler Chickens Fed Diets Supplemented With Herbal Methionine Vis-à-Vis Synthetic DL-Methionine During Summer Season”. Indian Journal of Animal Nutrition 35 (3). https://epubs.icar.org.in/index.php/IJAN/article/view/76901.