Vladimirovich Valoshin, Andrey, and . . “Optimization of Vitamin a Nutrition of Calves Fattened on Wastes of Food Industry”. International Journal of Engineering and Technology 7, no. 4.38 (December 3, 2018): 603–606. Accessed August 16, 2025. https://mail.sciencepubco.com/index.php/IJET/article/view/24631.