Botella, J., J. Almagro, E. Otero, P. Hierro, and C. Merino. 1998. “High Temperature Behaviour of Refractory Austenitic Stainless Steels: σ-Phase Formation and Oxidation in Air”. Revista De Metalurgia 34 (Extra):67-70. https://doi.org/10.3989/revmetalm.1998.v34.iExtra.710.