Ostapenko, Volodymyr Ivanovych. “DESIGN FEATURES OF HIVES IN MODERN BEEKEEPING IN UKRAINE”. Bulletin of Sumy National Agrarian University. The series: Livestock, no. 1 (July 11, 2022): 47-51. Accessed April 4, 2025. https://snaubulletin.com.ua/index.php/ls/article/view/620.