1. 1) W. A. REINSCH and H. W. ROSENBERG : Metal Progress, 118 (1980) Mar., p. 64
2. 2) M. OKADA, D. BANERJEE and J. C. WILLIAMS : Titanium Science and Technology, ed. by G. LÜTZERING, U. ZWICKER and W. BUNK (1985), p. 1835 [D. G. M.]
3. 3) J. C. WILLIAMS : Titanium Science and Technology, ed. by R. I. JAFFEE and H. M. BURTE (1973), p. 1433 [Prenum Press]
4. 4) G. M. PENNOCK, H. M. FLOWER and D. R. F. WEST : Titanium '80 Science and Technology, ed. by H. KIMURA and O. IZUMI (1980), p. 1343 [A.I.M.E.]
5. 5) M. OKADA : Proceedings of 6th World Conference on Titanium, ed. by P. LACOMBE, R. TRICOT and G. BÉRANGER (1988), p. 1269 [ Sociéte Francaise de Metallurgic]