[5] E. G. Fesenko. The Perovskite Family and Ferroelectricity(1972).
[6] IEEE Standard on Piezoelectricity ANSI/IEEE Std. 176-1987. (New-York, 1988), doi: 10.1109/IEEESTD.1988.79638.
[7] E. G. Fesenko, A. Ya. Danziger, O. N. Razumovskaya. New Piezoceramic Materials(1983).
[8] F. Cotton and J. Wilkinson, Modern Inorganic Chemistry, trans. from English. Part 3. (Publishing house “Mir”, M., 1969).
[9] A. Barnard, Theoretical Foundations of Inorganic Chemistry, trans. from English. (Publishing house “Mir”, M., 1968).
[10] Ch. N. R. Rao and J. Gopalakrishnan, New Directions in Solid State Chemistry, trans. from English. (Publishing house “Nauka”, Novosibirsk Department, Novosibirsk, 1990).
[11] D. M. Robertson, D. Henderson, G. Eyring and et al., Non-stoichiometric Compounds, ed. L. Mandelkorn, translated from English. (Publishing house “Chemistry”, M., 1971).
[12] V. V. Skopenko, A. Yu. Tsivadze, L. I. Savransky, A. D. Garnovsky. Coordination chemistry: A textbook(2007).
[13] B. F. Ormont. Introduction to Physical Chemistry and Crystal Chemistry of Semiconductors(1973).
[14] I. Narai-Sabo, Inorganic Crystal Chemistry, trans. from Hung. (Publishing House of the Academy of Sciences of Hungary, Budapest, 1969).
[15] H. Thomann. Piezoelectric mechanisms in lead zirconate-titanate. Z. Angew. Phys., 20, 554(1966).
[16] A. A. Bokov. Patterns of the effect of disorder in a crystal structure on ferroelectric phase transitions. JETP, 111, 1817(1977).
[17] T. B. Tokmyanina, O. N. Razumovskaya, I. N. Belyaev. Study of the formation of Pb2WCdO6 and Pb2WMgO6 from oxides. Izv. USSR Acad. Sci. Ser. Inorg. Mater., 12, 2099(1976).