Kuchta, Eliza, Kacper Wrzosek, Maria Leśniak, Kacper Ponikowski, Kornelia Kuchta, and Halina Piecewicz-Szczęsna. “Sleep Disturbances and Depression: A Narrative Review of the Bidirectional Relationship, Mechanisms, and the Role of Physical Activity”. Quality in Sport 63 (July 12, 2026): 73039. Accessed July 25, 2026. https://apcz.umk.pl/QS/article/view/73039.