НИЖНИК, Н. Р.; ГУМЕНЮК, І. О. Principles of differentiation of pension relations: some aspects of the theory of pension law. Scientific works of National Aviation University. Series: Law Journal "Air and Space Law", [S. l.], v. 2, n. 35, p. 26–30, 2015. DOI: 10.18372/2307-9061.35.8551. Disponível em: https://jrnl.nau.edu.ua/index.php/UV/article/view/8551. Acesso em: 5 may. 2024.