Two early rehabilitation training models in male patients after coronary artery bypass surgery: application of continuous walking training as an alternative to interval cycle ergometer training - Dolecińska, Dorota; Przywarska, Izabela; Podgórski, Tomasz; Dylewicz, Piotr (Kardiochirurgia i Torakochirurgia Polska/Polish Journal of Thoracic and Cardiovascular Surgery, 2020)