1. Karagounis, G., Helv. Chim. Acta, 37, 805 (1954). Deronane, E. G., Ampere Colloquium (1968).
2. Karagounis, G., Helv. Chim. Acta, 36, 282 (1953).
3. Bloembergen, N., Purcell, E. M., and Pound, R. V., Phys. Rev., 73, 796 (1948).
4. Karagounis, G., and Gutbrod, M., Praktiha. Acad. Athens, (October, 1966).