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2. Houdremont, E., Handbuch der Sonderstahlkunde, Berlin: Springer, 1956, vol. 2.
3. GOST (State Standard) 5632-2014: Stainless Steels and Corrosion Resisting, Heat-Resisting and Creep Resisting Alloys. Grades, Moscow: Standartinform, 2015.
4. GOST (State Standard) 17293-93: Ferrotungsten. Specification and Conditions of Delivery, Moscow: Izd. Standartov, 1995.
5. GOST (State Standard) 14638.15-84: Ferrotungsten. Method for Determination of Arsenic Content, Moscow: Izd. Standartov, 1981.