1. Learn, A.J.:J. Electrochem. Soc.,123, 994(1976).
2. Pramanik, D. and Saxena, A. N.:Solid State Technol.,26(1), 127 (1983).
3. Pramanik, D. and Saxena, A. N.:Solid State Technol.,26(3), 131 (1983).
4. Garosshen, T. J., Stephenson, T. A. and Slavin, T. P.:J. Metals,37(5), 55(1985).
5. Levy, R. A. and Green, M. L.:J. Electrochem. Soc.,134, 37C (1987).