Local dynamics of perovskite ferroelectrics with impuritiesKristoffel, Nikolai; Klopov, MihhailSeventh International Meeting on Ferroelectricity (IMF-7) : August 28-September 1, 1989 : abstracts1989 / p. 76 Local dynamics of perovskite ferroelectrics with impuritiesKristoffel, Nikolai; Klopov, MihhailFerroelectrics Letters Section1990 / p. 97-102