Kachmar, O.J., O.V. Vavrynovych, O.L. Dubytsky, A.O. Dubytska, and M.M. Shcherba. “Formation of Crop Rotation As a Means of Preventing Degradation аnd Improving Soil Fertility of the Carpathian Region”. Interdepartmental thematic scientific collection "Agriculture" 2, no. 95 (December 22, 2018): 20-25. Accessed April 7, 2020. https://zemlerobstvo.kiev.ua/index.php/journal/article/view/64.