1. F. N. Perel’man and A. A. Zvorykin, Molybdenum and Tungsten (Nauka, Moscow, 1968) [in Russian].
2. A. A. Opalovskii, I. I. Tychinskaya, Z. M. Kuznetsova, and P. P. Samoilov, Molybdenum Halides (Nauka, Novosibirsk, 1972) [in Russian].
3. A. N. Baraboshkin, Z. I. Valeev, Z. S. Martem’yanov, and V. G. Zyryanov, Elektrokhimiya 33(9), 1112 (1997) [Russ. J. Electrochem. 33 (9), 1033 (1997)].
4. Studies in Inorganic Chemistry, vol. 19: Molybdenum, Ed. by E. R. Braithwaite and J. Haber (Elsevier, Amsterdam, 1994).
5. E. I. Gedgagov and A. D. Besser, Tsvetn. Metall., No. 3, 49 (1998).