Surmach, Marina J., Ewgenij Tishchenko, and Halina Piecewicz-Szczęsna. “Modern Factors of Health and Their Peculiarities for Teenagers”. Polish Journal of Public Health 124, no. 3 (November 7, 2014): 152–155. Accessed August 16, 2025. https://czasopisma.umlub.pl/pjph/article/view/1669.