P.P. Fedorov, V.V. Osiko, S.V. Kuznetsov, O.V. Uvarov , M.N. Maykova, D.S. Yasirkina, A.A. Ovsyannikova, V.V. Voronov, V.K. Ivanov. Nucleation and growth of fluoride crystals by agglomeration of the nanoparticles // 2014. J. Crystal Growth. V.401. p.63-66.