KOVAL, Svitlana. System of state social insurance: experience of Ukraine and Germany. Scientific journal «World of Finance», [S. l.], n. 2(55), p. 67–77, 2019. DOI: 10.35774/sf2018.02.067. Disponível em: https://sf.wunu.edu.ua/index.php/wof/article/view/1177. Acesso em: 26 may. 2026.