Freedom and obligatory performance of a contract in the civil law of Ukraine. Bulletin of Kharkiv National University of Internal Affairs, [S. l.], v. 99, n. 4, p. 69–80, 2022. DOI: 10.32631/v.2022.4.06. Disponível em: https://visnyk.univd.edu.ua/index.php/VNUAF/article/view/522. Acesso em: 17 sep. 2025.