SAVANETS, Liudmyla; POPERECHNA, Hanna. The doctrine of hardship in contract law: comparative study. Actual problems of law, [S. l.], n. 2, p. 126–129, 2022. DOI: 10.35774/app2022.02.126. Disponível em: https://appj.wunu.edu.ua/index.php/apl/article/view/1371. Acesso em: 12 jul. 2025.