1. A.C. Hillman, P. Williams, U.S. Patent US 7328583 B2, 2008
2. N. Sheffer, N. Gefen, A. Gefen, in Proceedings of 9th Mediterranean Electrotechnical Conference, vol. 2, Tel-Aviv (1998), pp. 1453–1455
3. N. Sheffer, N. Gefen, A. Gefen, in Proceedings of the World Congress on Medical Physics and Biomedical Engineering, Nice, France (1997)
4. Myhre B.A., Nakasako Y.Y., Schott R.: Transfusion 18, 546 (1978)
5. Kruskall M.S., Pacini D.G., Malynn E.R., Button L.N.: Transfusion 30, 7 (1990)