Fotina, T., Nazarenko, S., Fotin, O., & Timoshenko, R. (2020). Application of enzyme with proteolytic activity of "Sinbenza® DP 100" for birds in the egg laying period. Bulletin of Sumy National Agrarian University. The Series: Veterinary Medicine, (3 (50), 17-22. https://doi.org/10.32845/bsnau.vet.2020.3.3