PANFOROVA, Maryna. Evolution of regulatory act in the system of sources of law of Ukraine of the IX - XIX centuries. Actual problems of law, [S. l.], n. 2, p. 57–62, 2021. DOI: 10.35774/app2021.02.057. Disponível em: https://appj.wunu.edu.ua/index.php/apl/article/view/1183. Acesso em: 25 jul. 2025.