BUS, Kateryna. The concept of convalidation of invalid deeds in the civil law of Ukraine. Actual problems of law (Aktual’ni problemi pravoznavstva), [S. l.], n. 3, p. 84–90, 2023. DOI: 10.35774/app2023.03.084. Disponível em: https://appj.wunu.edu.ua/index.php/apl/article/view/1671. Acesso em: 7 apr. 2026.