Bondarenko, Irina. 2020. “Cord Blood Serum Combined With Actovegin by Correction of the Reproductive Function of Cows ”. Bulletin of Sumy National Agrarian University. The Series: Veterinary Medicine, no. 4 (51) (December), 39-45. https://doi.org/10.32845/bsnau.vet.2020.4.6.