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\bibitem{Kirsanova_etal2019} {\textquotedblleft}\textit{Toward unlocking the Mn$^{3+}$/Mn$^{2+}$ redox pair in alluaudite-type Na$_{2+2z}$Mn$_{2-z}$(SO$_{4}$)$_{3-x}$(SeO$_{4}$)$_{x}$ cathodes for sodium-ion batteries}{\textquotedblright}. Kirsanova MA, De Sloovere D, Karakulina OM, Hadermann J, Van Bael MK, Hardy A, Abakumov AM, Journal of solid state chemistry \textbf{277}, 804 (2019).   http://doi.org/10.1016/J.JSSC.2019.07.032

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