Kovalenko , N. P. “Scientific Agricultural Societies and Their Role in Distribution of Knowledge about Crop Rotations in Agricultural of Ukraine (the Second Half of ХІХth Is Beginning of ХХth Century)”. Zaporizhzhia Historical Review, Vol. 1, no. 39, June 2021, pp. 282-6, https://istznu.org/index.php/journal/article/view/1407.