O. Tjomsland, R. Wiseth, A. Wahba, A. Tromsdal, S. O. Samstad, and R. Haaverstad, “Intraoperative Color Doppler Ultrasound Assessment of Anastomoses of the Left Internal Mammary Artery to the Left Anterior Descending Coronary Artery during Off-Pump Coronary Artery Bypass Surgery Correlates with Angiographic Evaluation at the 8-Mont”, HSF, vol. 6, no. 5, pp. 375-379, Feb. 2005.