Abicht, J.-M., A. Beiras-Fernandez, D. Bengel, and C. Vicol. “Deep Pericardial Traction Suture Versus Vacuum-Assisted Apical Suction to Expose the Posterior Wall of the Heart in Off-Pump Coronary Artery Bypass: A Prospective, Randomized Study”. The Heart Surgery Forum, vol. 15, no. 4, Aug. 2012, pp. E224-E231, doi:10.1532/HSF98.20121028.