G. I. Panfilova, O. L. Tretyakova, A. S. Degtyar, V. N. Nefedova, and S. V. Semenchenko, “A Study on the Dynamics of the Development of Red Steppe Cows and Their Ayrshire and Holstein Crossbreeds”, KLS, vol. 6, no. 3, pp. 485–491, Apr. 2021.