Beckman, Daniel J., Karen Bumb, Maria Bandy, Maria Evans, and Cindy Romanyk. “Evaluation of Hemodynamics: Comparison of Vacuum and Mechanical Stabilization in the Beating Heart”. The Heart Surgery Forum 6, no. 4 (February 7, 2005): 220-223. Accessed December 8, 2021. https://journal.hsforum.com/index.php/HSF/article/view/952.