Ladyka, V. I., Pavlenko, Y. M., & Skliarenko, Y. I. (2022). FORMATION OF ECONOMICALLY USEFUL TRAITS IN COWS THE SUMY INNEVSTRAIUS OF UKRAINIAN BLACK-AND-WHITE DAIRY BREED OF DIFFERENT GENOTYPES BY BETA-CASEIN. Bulletin of Sumy National Agrarian University. The Series: Livestock, (2), 20-23. https://doi.org/10.32845/bsnau.lvst.2022.2.4