Bugajska, B. . (2021) “The ninth stage in the cycle of life – attempt to extend the E. H. Erikson’s theory”, Exlibris Social Gerontology Journal, 9(1), pp. 19–36. Available at: https://ojs.wsb.edu.pl/index.php/bgs/article/view/693 (Accessed: 15 October 2026).