1. Artificial Heart in the Chest and Use of Polyurethane for Making Hearts, Valves, and Aortas;Kolff;Tr. Am. Soc. Art. Int. Organs,1959
2. Roller Type of Artificial Heart Within the Chest;Akutsu;Am. Heart J.,1960
3. Pendulum Type of Artificial Heart Within the Chest;Houston;Am. Heart J.,1960
4. Air-driven Artificial Hearts Inside the Chest;Seidel;Tr. Am. Soc. Art. Int. Organs,1961
5. Properties of Estane VC, a Urethane Material That Is Under Study in Prostheses;Schollenberger,1961