1. Reznik, I.D., Ermakov, G.P., and Shneerson, Ya.M., Nikel’ (Nickel), Moscow: Nauka i Tekhnologii, 2003, vol. 3.
2. ITS (Information and Technical Handbook on the Best Available Technologies) 12–2016: Nickel and Cobalt Production, Moscow: Byuro Nailuchshikh Dostupnykh Tekhnologii, 2016.
3. Kablov, E.M., Logunov, A.V., and Sidorov, V.V., Metally, 2000, no. 6, pp. 40–46.
4. Zakharov, A.V., Mal’ts, I.E., Khomchenko, O.A., and Kasikov, A.G., Tsvetn. Met., 2013, no. 10, pp. 51–55.
5. Plotnikov, D.P., Druzhinina, T.V., and Kostikov, S.Yu., Khim. Tekhnol., 2005, no. 3, pp. 34–37.