DEREZA, V. The state and problems of common black soils’ fertility in Poltava region. Scientific Progress & Innovations, [S. l.], v. 26, n. 1, p. 43–48, 2023. DOI: 10.31210/spi2023.26.01.07. Disponível em: https://journals.pdau.edu.ua/visnyk/article/view/1740. Acesso em: 3 nov. 2025.