BURLACU, I. Three-layered policy filter in free movement for work and welfare (a conceptual framework of the EU social security coordination, national social security and taxes on the welfare of frontier workers). TRANSBORDER ECONOMICS. International Journal on Transborder Economics, Finance, Politics and Statistics., [S. l.], v. 1, n. 1, p. 41–82, 2023. Disponível em: https://journals.ur.edu.pl/te/article/view/8617. Acesso em: 21 lis. 2024.