1. J. A. Vinables, Phil. Mag.,7, No. 73 (1962).
2. H. Schumann, Arch. Eisenhüttenwesen,40, No. 12 (1970).
3. Yu. N. Goikhenberg, D. A. Mirzaev, et al., in: Trudy Chelyabinskogo Politekhnicheskogo Instituta. No. 107, Izd. ChPI, Chelyabinsk (1972).
4. D. A. Mirzaev et al.: Fiz. Met. Metalloved.,35, No. 6 (1973).
5. D. Mugnier and L. Weil, Advances in Cryogenic Engineering, Vol. 9 (1964).