Detter, C., D. Russ, A. Iffland, S. Wipper, M. O. Schurr, H. Reichenspurner, . G. Buess, and B. Reichart. “Near-Infrared Fluorescence Coronary Angiography: A New Noninvasive Technology for Intraoperative Graft Patency Control”. The Heart Surgery Forum, vol. 5, no. 4, Dec. 2002, pp. E364-E369, https://journal.hsforum.com/index.php/HSF/article/view/6045.