1. Abella, P.A., Cordomi, M.C., and Draper, J.–C.M., Nb–Ta-minerals from the pegmatite field, Eastern Pyrenees: distribution and geochemical trends, Mineral. Petrol., 1995, vol. 55, pp. 53–69.
2. Barth, T.F., The feldspar lattices as solvent of foreign ions, Inst. Lucas Mallada, Cursillos y Conferencias, Madrid, 1961, pp. 3–8.
3. Berman, R.G., Internally–consistent thermodynamic data for stoichiometric minerals in the system Na2O–K2O–CaO–MgO–FeO–Fe2O3–Al2O3–SiO2–TiO2–H2O–CO2, J. Petrol., 1988, vol. 29, pp. 445–522.
4. Beskin, S.M. and Shmakin, B.M., Albite–spodumene pegmatites as variety of rare–metal granites, Dokl. Akad. Nauk SSSR, 1980, vol. 252, no. 3, pp. 684–687.
5. Beskin, S.M. and Marin, Yu.B., Geodynamic types of rare–metal granitic magmatism, in Granity i protsessy rudoobrazovaniya (Granites and Processes of Ore Formation), Moscow: IGEM RAN, 2011, pp. 30–31.