1. R. H. Atkinson, et al.: Physical Metallurgy of Tungsten and Tungsten Base Alloys, Technical Report 60–37, WADD, May 1960.
2. First Quarterly Progress Report: Hot Pressed Tungsten Base Alloys for Rocket Nozzles, Haynes Stellite Co., 10 June 1960.
3. C. J. Comstock: Iron Age, vol. 156, no. 9. 36A, 1945.
4. C. J. Trapp, B. E. Berry, et al.: Symposium on Powder Metallurgy, Iron and Steel Institute, Special Report No. 38, London, 1947, p. 92.
5. C. G. Goetzel, Treatise on Powder Metallurgy Volume I, 1949, Interscience Publishers Inc., p. 423–468.