Kowalczyk, Aleksandra, Adrian Jan Pączek, Paweł Dyczek, Julia Hofman, and Wiktoria Staniszewska. “The Role of Sleep Disturbances in Depression and Anxiety: A Literature Review”. Journal of Education, Health and Sport 85 (November 16, 2025): 66500. Accessed December 27, 2025. https://apcz.umk.pl/JEHS/article/view/66500.