Wawryniuk, A., K. Kopeć, R. J. Łuczyk, K. Sikora, and M. Łuczyk. “Quality of Life of Patients After a Myocardial Infarction”. Journal of Education, Health and Sport, vol. 11, no. 6, June 2021, pp. 178-85, doi:10.12775/JEHS.2021.11.06.019.