1. Wittig, G. and Geissler, G., Justus Liebigs Annalen der Chemie, 1953, vol. 580, p. 44.
2. Zykova, A.R.. Vestnik YuUrGU.
Ser. Khim., 2020, vol. 12, no. 4, p. 5.
3. Sharutin, V.V., Poddel’skii, A.I., and Sharutina, O.K., Russ. J. Coord. Chem., 2020, vol. 46, no. 10, p. 663.
4. Sharutin, V.V. and Mosunova, T.V., Vestnik YuUrGU.
Ser. Khim., 2020, vol. 12, no. 3, p. 7.
5. Razuvaev, G.A. and Osanova, N.A., Dokl. Akad. Nauk SSSR, 1955, vol. 104, no. 4, p. 552.