Petko , Mariya, Vitaliy Fedorovych, Yelysaveta Fedorovych, and Nataliya Mazur. 2020. “Egg Production and Honey Productivity of Different Linear Bees Cross of Carpathian Breed”. Bulletin of Sumy National Agrarian University. The Series: Livestock, no. 4(43) (December), 71-75. https://doi.org/10.32845/bsnau.lvst.2020.4.11.