1. J. P. Fraser, G. G. Eldredge, and R. S. Treseder, Corrosion,14, No. 11, 517t (1958).
2. R. M. Heady, "Evaluation of sulfide corrosion cracking in gas and oil wells," Shell Development Technical Progress Report BRC-Corporation, 5-74-P, May, 1974.
3. E. Hornbogen, "Verfestigungsmechanismen in Stählen," Climax Symposium Steel-Strengthening Mechanisms, Zurich, Switzerland, May 5?6, 1969.
4. T. Prnka, Archiv für das Eisenhüttenwesen,42, No. 12, 919 (1971).
5. E. Herzog, Revue de Metallurgie,55, 123 (1958).