1. The artificial kidney: a dialyser with a great area;KOLFF;Acta Med. Scandinav.,1944
2. Further development of a coil kidney;KOLFF;J. Lab. and Clin. Med.,1956
3. Artificial heart in the chest and use of polyurethane of making hearts, valves and aortas;KOLFF;Trans. Amer. Soc. Intern. Organs,1959
4. Pendulum type of artificial heart within the chest;HOUSTON;Amer. Heart J.,1960
5. Artificial hearts inside the chest, using small electromotors;AKUTSU;Trans. Amer. Soc. Intern. Organs,1960