1. D. A. HUKIN, UK Patent F4B-51-A13A3-C10B (1970).
2. B. A. SMITH and B. DENTON,J. Mater. Sci. 15 (1980) 2515.
3. P. SPIRO, in ?Electroforming: a Comprehensive Survey of Theory, Practice and Commerical Applications? (Robert Draper, Teddington, 1968) Ch. 4, p. 27.