1. Gy. Gergely, I. Hangos, K. Tóth, J. Ádám andGy. Pozsgay, Z. Phys. Chem.,210, 10, 1959.
2. Gy. Gergely, Z. Phys. Chem.,211, 274, 1959.
3. Gy. Gergely andI. Hangos, Symposium on Solid State Physics in Electronics and Telecommunications, Bruxelles 1958, Academic Press, London, 1960. Vol. 4. p. 724.
4. P. H. Dowling andJ. R. Sewell, J. El. Chem. Soc.,100, 22, 1953.
5. D. Hahn andK. Lertes, Z. Phys.,156, 425, 1959.