1. Yu. I. Archakov, Zh. Prikl. Khim.,33, No. 11 (1960).
2. Yu. I. Archakov, in: Influence of Hydrogen on the Service Properties of Steel [in Russian], Irkutskoe Khizhnoe Izd., Irkutsk (1963).
3. G. A. Nelson, Hydrocarbon Processing,44, No. 5 (1965).
4. G. A. Nelson, Werkstoffe und Korrosion,14, No. 2 (1963).
5. K. Bischoff, Stahl und Eisen,57, No. 15 (1937).