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\bibitem{Tan_etal2012} {\textquotedblleft}\textit{Oxidation state and chemical shift investigation in transition metal oxides by EELS}{\textquotedblright}. Tan H, Verbeeck J, Abakumov A, Van Tendeloo G, Ultramicroscopy \textbf{116}, 24 (2012).   http://doi.org/10.1016/j.ultramic.2012.03.002

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