Gucol, A., Y. Kovalskyi, L. Kovalska, and N. Gucol. “Effect of Probiotics on Growth, Development and Economically Useful Traits Honeybees”. Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies. Series: Agricultural sciences 19, no. 74 (March 30, 2017): 235–238. Accessed June 27, 2022. https://nvlvet.com.ua/index.php/agriculture/article/view/2335.