Adamczyk, Katarzyna, et al. “The Problem of Divers, Aviators and Paratroopers - Barotrauma of the Paranasal Sinuses”. Journal of Education, Health and Sport, vol. 8, no. 9, Sept. 2018, pp. 786-93, https://apcz.umk.pl/JEHS/article/view/5937.