SZCZYGIEL, Nina. Znaczenie i natura szczęścia. European Journal of Management and Social Science, [S. l.], v. 1, n. 1, p. 7–10, 2024. DOI: 10.56652/ejmss2020.1.2. Disponível em: https://ejmss-journal.com/index.php/ejmss/article/view/2. Acesso em: 31 sty. 2026.