1. Chirkst, D.E., Melikhov, I.V., Syrkin, L.N. et, al., Zh. Prikl. Khim., 1991, vol. 64, no. 12, pp. 2576–2581.
2. Lebedev, V.N., Masloboev, V.A., Popova, L.A., and Serkova, R.P., Problemy effektivnogo ispol’zovaniya mineral’nogo syr’ya Kol’skogo poluostrova (Problems of Effective Use of the Mineral Raw Material of Kola Peninsula), Apatity, 1993, pp. 43–49.
3. Kazak, V.G., Angelov, A.I., and Zaitsev, P.M., Khim. Promst’, 1995, no. 11, pp. 11–19.
4. Lokshin, E.P., Tareeva, O.A., and Elizarova, I.R., Zh. Prikl. Khim., 2011, vol. 84, no. 5, pp. 743–751.
5. Kul’ba, F.Ya., Nikolaeva, S.A., Gavryuchenkov, F.G., and Reshetnikova, Z.V., Zh. Prikl. Khim., 1975, vol. 48, no. 11, pp. 2547–2549.