Podhorecka, M., Cytarska, M., Gębka, D., Perkowski, R., Jaroch, A., Siedlecka–Główczewska, E., Sokołowski, R., Radzińska, M., Zukow, W. and Kędziora-Kornatowska, K. (2017) “Sleep quality disorders among the people of old and presenile age”, Journal of Education, Health and Sport, 7(12), pp. 322–338. Available at: https://apcz.umk.pl/JEHS/article/view/5181 (Accessed: 6 October 2024).