1. R. P. Reed, in; Advances in Cryogenic Engineering, Vol 7, Plenum Press, New York (1961), p. 448.
2. V. V. Pustovalov and D. A. Didenko, Trans. Japan. Inst. Metals, Suppl. 9:453 (1968).
3. D. A. Didenko, V. V. Pustovalov, and V. V. Vershinina, Phys. Metal. Metallog., 23(2): 139 (1967).
4. O. V. Klyavin and A. V. Stepanov, Fiz. Tverdogo Tela, 1(11): 1733 (1959).
5. I. A. Gindin, V. I. Khotkevich, and Ya. D. Starodubov, Phys. Metal Metallog., 7(5): 140 (1959).