The influence of epicardial and endocardial use of cryoenergy on the completeness of lesions in surgical ablation of atrial fibrillation - Kurfirst, Vojtech; Csanady, Julia; Mokracek, Ales; Hanis, Jiri; Bulava, Alan; Pesl, Ladislav (Kardiochirurgia i Torakochirurgia Polska/Polish Journal of Thoracic and Cardiovascular Surgery, 2020)