MARCJASZ, Piotr, BIOŁY, Anna, BOROŃCZYK, Agnieszka, ZAJĄC, Piotr, BULISZAK, Agnieszka and BABCZYŃSKA, Monika. Periodontal Diseases as a Risk Factor for Severe Course and Mortality in COVID-19 – An Interdisciplinary Analysis in Light of Available Studies. Quality in Sport. Online. 22 April 2025. Vol. 40, p. 59831. [Accessed 29 June 2025]. DOI 10.12775/QS.2025.40.59831.