R. J. Shemin, O. M. Shapira, R. V. Pawar, Y. Bao, U. Sayeed-Shah, and H. L. Lazar, “U-Clip Anastomoses in Coronary Artery Bypass Grafting: Initial Clinical Experience”, HSF, vol. 6, no. 5, pp. 362-365, Feb. 2005.