WIEDEMANN, D.; BONAROS, N.; FEUCHTNER, G.; BONATTI, J.; SCHACHNER, T. Difficulties in Beating-Heart Totally Endoscopic Coronary Artery Bypass Grafting: How to Handle the Problem Endoscopically. The Heart Surgery Forum, v. 12, n. 3, p. E141-E142, 22 Jun. 2009.