FABIŚ, Artur. Spiritual development as an attribute of the maturity in an old age. Exlibris Social Gerontology Journal, [S. l.], v. 9, n. 1, p. 11–18, 2015. Disponível em: https://ojs.wsb.edu.pl/index.php/bgs/article/view/694. Acesso em: 21 sep. 2026.