1. B.A. Kuznetsov, Metallov. I Term. Obrabotka Metallov, 3 (Feb.) (1958) p.28.
2. G.K. L’Vov, Metalov. I Term. Obrabotka Metallov, 4 (Apr.) (1959) 8.
3. Staub und Cieslak, translated (BISITS 3660) from Archiwum Hutnicwa 7 (1962) 333.
4. S. Garber, Recent Developments in Annealing, Iron and Steel Inst., London, (1963) p.81.