Mykhalko, O. H., and I. V. Levchenko. “STATE OF PIG FARMING IN SUMY REGION”. Bulletin of Sumy National Agrarian University. The series: Livestock, no. 3 (December 27, 2022): 18-29. Accessed November 21, 2024. https://snaubulletin.com.ua/index.php/ls/article/view/714.