Kulibaba, S., M. Dolgaya, N. Emelyanova, and G. Goncharenko. “Effect of Feeding Chelates of Trace Elements on Morphological and Biochemical Blood Indicators of Cows”. Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies. Series: Agricultural sciences 19, no. 74 (March 3, 2017): 119-122. Accessed October 22, 2020. https://nvlvet.com.ua/index.php/agriculture/article/view/2311.