European Contegra Multicentre Study: 7-Year Results after 165 Valved Bovine Jugular Vein Graft Implantations - Breymann, T.; Blanz, U.; Wojtalik, M. A.; Daenen, W.; Hetzer, R.; Sarris, G.; Stellin, G.; Planche, C.; Tsang, V.; Weissmann, N.; Boethig, D. (The Thoracic and Cardiovascular Surgeon, 2009)