1. K. Kiukkola and C. Wagner:J. Electrochem. Soc, 1957, vol. 104, pp. 308–16; 379-87.
2. Y. Matsushita and K. Goto:J. Fac. Eng. Univ. Tokyo, 1964, vol. 27, pp. 217–80.
3. R. Littlewood:Can. Met. Q., 1966, vol. 5, pp. 1–16.
4. D. O. Raleigh:Progress in Solid State Chemistry, H. Reiss, ed., vol. 3, pp. 83–132, Macmillan and Co., New York, 1966.
5. H. Schmalzried:Thermodynamics, vol. 1, pp. 97–108, International Atomic Energy Agency, Vienna, 1966.