1. M.O. Speidel and A. Pineau.: Conf. Proc. “High Temperature Alloys for Gas Turbines”, Liege, 1978. Ed. D. Coutsouradis et al. Appl. Sci. Pub. 469.
2. S.R. Holdsworth,: Proc. “4th Int. Conf. on Superalloys”, Seven Springs, 1980, September. Ed. J.K. Tien et al. ASM:365.
3. R.B. Scarlin and M.O. Speidel.: BBC(Baden) Report, COST 50 Final Report of 1CH3/3: 1976, July.
4. S.R. Holdsworth.: GEC(Whetstone) Report No. W/CML/1977/49, COST 50 Final Report of 1UK1: 1977, September
5. R. Ekbom et al: Stal Lavel Report: COST 50 First interim report of 1S1: 1974, October.