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\bibitem{Nikolaev_etal2008} {\textquotedblleft}\textit{Crystal structure, phase transition, and magnetic ordering in perovskitelike Pb$_{2-x}$Ba$_{x}$Fe$_{2}$O$_{5}$ solid solutions}{\textquotedblright}. Nikolaev IV, d{\textquoteright} Hondt H, Abakumov AM, Hadermann J, Balagurov AM, Bobrikov IA, Sheptyakov DV, Pomjakushin VY, Pokholok KV, Filimonov DS, Van Tendeloo G, Antipov EV, Physical review : B : condensed matter and materials physics \textbf{78}, 024426 (2008).   http://doi.org/10.1103/PhysRevB.78.024426

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