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\bibitem{Dixon_etal2011} {\textquotedblleft}\textit{Mn(I) in an extended oxide : the synthesis and characterization of La$_{1-x}$Ca$_{x}$MnO$_{2+\delta}$ (0.6\leq x\leq1)}{\textquotedblright}. Dixon E, Hadermann J, Ramos S, Goodwin AL, Hayward MA, Journal of the American Chemical Society \textbf{133}, 18397 (2011).   http://doi.org/10.1021/ja207616c

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