1. E. O. Osmanov, Dissertation for Candidate’s Degree [in Russian], Silicate Chemistry Institute, Leningrad (1965).
2. See also V. I. Ivanov-Omskii, Dissertation for Candidate’s Degree [in Russian], State Optical Institute, Leningrad (1961).
3. See also L. I. Berger, Dissertation for Candidate’s Degree [in Russian], M. I. Kalinin Institute for Nonferrous Metals and Gold, Moscow (1958).