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\bibitem{Pardo_etal2006} {\textquotedblleft}\textit{Thickness-dependent transport properties of Sr$_{4}$Fe$_{6}$O$_{13}$ epitaxial thin films}{\textquotedblright}. Pardo JA, Santiso J, Solis C, Garcia G, Figueras A, Rossell MD, Solid state ionics \textbf{177}, 423 (2006).   http://doi.org/10.1016/J.SSI.2005.11.024

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