O’RALOVNA, K. G. . Historical Levels of National Values. European Journal of Life Safety and Stability (2660-9630), [S. l.], v. 28, p. 44-48, 2023. Disponível em: http://www.ejlss.indexedresearch.org/index.php/ejlss/article/view/1028. Acesso em: 5 oct. 2025.