1. Emery RW, Palmquist WE, Metter E, Nicoloff DM. A new cardiac valve prosthesis. In vitro results. Trans Am Soc Artif Intern Organ 1978; 24: 550–556.
2. Hehrlein FW, Gothwik M, Freadrich G, Mulch J. First clinical experience with a new all-pyrolytic carbon bileflet heart valve prosthesis. J Thorac Cardiovasc Surg 1980; 79: 632–636.
3. Nicoloff DM, Emery RW, Aron KV, Northrup III WF, Jorgensen CR, Wang Y, Lindsay WG. Clinical and hemodynamic results with the St. Jude Medical cardiac valve prosthesis. J Thorac Cardiovasc Surg 1981; 82: 674–683.
4. Koja K, Kuniyoshi S, Toyama M, Uesato T, Kuniyoshi Y, Gima T, Sho Y. Combined aortic and mitral valve replacement under ischemia arrest using an intrapericardial cooling mat and cold cardioplegia. Jpn J Artif Organs 1981; 10: 610–614. (in Japanese with English abstract)
5. Koja K, Kinjo O, Akasaki M, Omine Y, Shiroma H, Ikemura F, Iha K, Kuniyoshi Y, Uesato T, Kina M, Yara I, Kusaba A. Clinical experience with St. Jude Medical valve prosthesis (114 patients). Jpn J Artif Organs 1984; 13: 311–315. (in Japanese with English abstract)