1. J. C. Greenbank and S. Harper,Electrochem. Tech. 4, 88 (1966).
2. B. Griggs, H. P. Mafei, and D. W. Shannon,J. Electrochem. Soc. 109, 665 (1962).
3. J. A. Davies, Chalk River Nuclear Laboratories (Unpublished results) (1965).
4. B. Cox,J. Nucl. Mat. 29, 55 (1969).
5. J. P. Pemsler,Electrochem. Tech. 4, 128 (1966).