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\bibitem{Korneychik_etal2011} {\textquotedblleft}\textit{Pb$_{2.85}$Ba$_{2.15}$Fe$_{4}$SnO$_{13}$ : a new member of the A$_{n}$B$_{n}$O$_{3n-2}$ anion-deficient perovskite-based homologous series}{\textquotedblright}. Korneychik OE, Batuk M, Abakumov AM, Hadermann J, Rozova MG, Sheptyakov DV, Pokholok KV, Filimonov DS, Antipov EV, Journal of solid state chemistry \textbf{184}, 3150 (2011).   http://doi.org/10.1016/j.jssc.2011.09.029

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