1. G. Wassermann, Arch. Eisenhüttenw. 6 (1932?33) 347.
2. K. A. Malyshev, N. A. Borodina and V. A. Mirmel'shteyn, Trudy. Inst. Fiz. Metal. 20 (1958) 339.
3. V. G. Gorbach and E. D. Butakovo, Phys. Met. Metal. 16 (2) (1963) 112.
4. Ya. M. Golovchiner, ibid 15 (4) (1963) 54.
5. V. G. Gorbach and K. A. Malyshev, ibid 17 (2) (1964) 65.