Przysada, G., D. Smerecka, J. Rykała, J. Podgórska-Bednarz, J. Leszczak, and A. Wilczek-Banc. “Analysis of Exercise Tolerance and Fatigue Evaluation in Patients after Coronary Artery Bypass Grafting Undergoing Cardiac Rehabilitation”. European Journal of Clinical and Experimental Medicine, vol. 12, no. 2, June 2014, pp. 141–151, https://journals.ur.edu.pl/ejcem/article/view/12567.