1. Bessis, M., and Ter-Pogossian, M. M., Ann. NY Acad. Sci., 122, 689 (1965).
2. Moreno, G., Lutz, M., and Bessis, M., Int. Rev. Exp. Pathol., 7, 99 (1969).
3. Berns, M. W., Olson, R. S., and Rounds, D. E., Nature, 221, 74 (1969).
4. Berns, M. W., and Cheng, W., Nature, 233, 122 (1971).
5. Moreno, G., Salet, C., and Bessis, M., CR Acad. Sci. Paris, 269, 781 (1969).