1. New Steels for Power Industry. Stainless Steels, Iron and Steel Inst., London 1969, p. 1.
2. Optimalization of Heat Treatment of 13% Cr Steels modified with 6% Ni (in Czech.); The Probleme of High-Strength CrNi Stainless Steels of Martensitic Type, DT Ostrava 1980, p. 238.