1. Zelikman, A.N., Molibden (Molybdenum), Moscow: Metallurgiya, 1970, pp. 37–39.
2. Osnovy metallirgii. Redkie metally (Foundations of Metallurgy. Rare Metals), Greiver, N.S., Ed., Moscow: Metallurgiya, 1967, vol. 4, p. 26.
3. FRG Patent 3843172, 1990.