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\bibitem{Batuk_etal2013} {\textquotedblleft}\textit{Structure and magnetic properties of a new anion-deficient perovskite Pb$_{2}$Ba$_{2}$BiFe$_{4}$ScO$_{13}$ with crystallographic shear structure}{\textquotedblright}. Batuk M, Tyablikov OA, Tsirlin AA, Kazakov SM, Rozova MG, Pokholok KV, Filimonov DS, Antipov EV, Abakumov AM, Hadermann J, Materials research bulletin \textbf{48}, 3459 (2013).   http://doi.org/10.1016/j.materresbull.2013.05.028

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