Gao, Changqing, Ming Yang, Gang Wang, Jiali Wang, Cangsong Xiao, Yang Wu, and Jiachun Li. “Totally Endoscopic Robotic Atrial Septal Defect Repair on the Beating Heart”. The Heart Surgery Forum 13, no. 3 (June 9, 2010): E155-E158. Accessed October 30, 2020. https://journal.hsforum.com/index.php/HSF/article/view/232.