Kielnar, Renata, and Elżbieta Domka-Jopek. 2005. “The Importance of the Evaluation of the Quality of Life before and After a Three – Month Cardiological Group Rehabilitation of Patients Suffering from Coronary Heart Disease”. European Journal of Clinical and Experimental Medicine 3 (4):355–361. https://journals.ur.edu.pl/ejcem/article/view/13440.