Yzeiraj, E., and V. Ceroni. “Biotine Supplement in Food Ration and Reproductive Performance in Cows for Milk Production”. ANGLISTICUM. Journal of the Association-Institute for English Language and American Studies, vol. 6, no. 5, June 2017, pp. 61-66, https://anglisticum.ielas.org/index.php/IJLLIS/article/view/1463.