1. Fedorov, P.P., Sobolev, B.P., and Belov, S.F., Liquidus diagram of the NaF–YF3 system and Na0.4Y0.6F2.2–YOF section, Izv. Akad. Nauk SSSR,
Neorg. Mater., 1979, vol. 15, no. 5, pp. 816–819.
2. Fedorov, P.P., Systems of alkali and rare-earth metal fluorides, Russ. J. Inorg. Chem., 1999, vol. 44, no. 11, pp. 1703–1727.
3. Fedorov, P.P., Kuznetsov, S.V., and Osiko, V.V., Elaboration of nanofluorides and ceramics for optical and laser applications, Photonic and Electronic Properties of Fluoride Materials, Tressaud, A. and Poeppelmeier, K., Eds., Amsterdam: Elsevier, 2016, pp. 7–31.
4. Haase, M. and Schafer, H., Upconverting nanoparticles, Angew. Chem., 2011, vol. 50, no. 26, pp. 5808–5829.
5. Fedorov, P.P., Mayakova, M.N., Voronov, V.V., Baranchikov, A.E., and Ivanov, V.K., Preparation of “NaRF4” phases from the sodium nitrate melt, J. Fluorine Chem., 2019, vol. 218, pp. 69–75.