1. A. Fleischer,J. Electrochem. Soc. 94 (1948) 289.
2. Gmelins Handbuch ?Nickel?, Teil A II (1968).
3. S. U. Falk and A. J. Salkind, ?Alkaline Storage Batteries?, John Wiley, New York, London, Sydney, Toronto (1970).
4. H. H. Doehren and H. Kr�ger (Varta A.G.), West Germany Patent No. 1148 286 (1959/63).
5. Ju. M. Pozin, N. I. ?tercer, N. Je. Griliches and B. Fisman,Sb. Rab. po Chim. Isto?nikam Toka 9 (1974) 73.