1. Private communication.
2. Influence de l'hydrogène sur le comportement des métaux, IV;Broudeur;Rapport CEA-R4701,1976
3. Material Science;Quick;Cornell University, Ithaca, N.Y. Report No. 2608,1976
4. International Symposium on Plasma Wall Interaction;Mathewson,1976
5. International Symposium on Plasma Wall Interaction;Dietz,1976