PHASE FORMATION AND PHYSICOCHEMICAL PROPERTIES OF PEROVSKITE COMPLEX OXIDES BASED ON BISMUTH FERRITE Статья Tsyrulnikova N.V., Kashirina M.A., Fortalnova E.A., Safronenko M.G., Politova E.D., Venskovskii N.U. Russian Journal of Inorganic Chemistry. IAPC Nauka/Interperiodica. Том 57. 2012. С. 28-32