Wiedemann, D., Bonaros, N., Feuchtner, G., Bonatti, J., & Schachner, T. (2009). Difficulties in Beating-Heart Totally Endoscopic Coronary Artery Bypass Grafting: How to Handle the Problem Endoscopically. The Heart Surgery Forum, 12(3), E141-E142. https://doi.org/10.1532/HSF98.20091040