1. S. J. Noesen and J. R. Hughes:Trans. TMS-AIME, 1960, vol. 218, p. 256.
2. B. C. Allen, D. J. Maykuth, and R. I. Jaffee:J. Inst. Metals, 1961, vol. 90, p. 120.
3. W. D. Klopp and W. R. Witzke: Mechanical Properties and Recrystallization Behavior of Electron-Beam-Melted Tungsten Compared with Arc-Melted Tungsten, NASA Technical Note D-3232, 1966.
4. K. Farrell, A. C. Schaffhauser, and J. O. Stiegler:J. Less-Common Metals, 1966, vol. 13, p. 141.
5. J. W. Pugh:Plansee Proceedings on High Melting Point Metals, F. Benesovsky, ed., p. 97, 1958, Metallwerk Plansee AG., 1959.