Likosky, Donald S., Desmond J. Donegan, Robert C. Groom, Scott A. Buchanan, Jeremy R. Morton, Cathy S. Ross, and Gerald T. O.Connor. “Embolic Activity Subsequent to Injection of the Internal Mammary Artery With Papaverine Hydrochloride”. The Heart Surgery Forum 8, no. 6 (October 27, 2005): E434-E436. Accessed October 21, 2020. https://journal.hsforum.com/index.php/HSF/article/view/499.