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3. Reznik, I.D., Ermakov, G.P., and Shneerson, Ya.M., Nikel’. Tom 2. Okislennye nikelevye rudy. Kharakteristika rud. Pirometallurgiya i gidrometallurgiya okislennykh nikelevykh rud (Nickel, Vol. 2: Oxidized Nickel Ores. Characteristic of Ores. Pyrometallurgy and Hydrometallurgy of Oxidized Nickel Ores), Moscow: Nauka i Tekhnologiya, 2001.
4. GOST (State Standard) 17001.4-86: Ferrosilicozirconium, Methods for Determination of Zirconium, Moscow: Izd. Standartov, 1986.
5. GOST (State Standard) 17001.5-86: Ferrosilicozirconium, Methods for Determination of Phosphorus, Moscow: Izd. Standartov, 1986.