ПИСАРЕНКО, П. В.; ХЛЕБНІКОВА, Я. О. Many-years changes of yield and «yield waves» in Poltava region. Scientific Progress & Innovations, [S. l.], n. 3, p. 32–39, 2015. DOI: 10.31210/visnyk2015.03.03. Disponível em: https://journals.pdau.edu.ua/visnyk/article/view/853. Acesso em: 23 aug. 2025.