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\bibitem{Goris_etal2014} {\textquotedblleft}\textit{Three-dimensional valency mapping in ceria nanocrystals}{\textquotedblright}. Goris B, Turner S, Bals S, Van Tendeloo G, ACS nano \textbf{8}, 10878 (2014).   http://doi.org/10.1021/nn5047053

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