Kulczyński, Marcin, Michał Marciniec, Klaudia Sapko, Ewa Papuć, and Konrad Rejdak. 2018. “Airplane Headache – an Underestimated Problem?”. Journal of Education, Health and Sport 8 (7):357-63. https://apcz.umk.pl/JEHS/article/view/5659.