Athanassopoulos G, Motsi A, Karatasakis G, Voudris V, Pavlides G, Koutelou M, Cokkinos DV. Comparison of non-invasive techniques for assessing left internal mammary/left anterior descending patency. In: EUROPEAN HEART JOURNAL. Vol. 21. WB SAUNDERS CO LTD 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND; 2000. pp. 688–688.