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\bibitem{Schouteden_etal2013} {\textquotedblleft}\textit{Band structure quantization in nanometer sized ZnO clusters}{\textquotedblright}. Schouteden K, Zeng Y-J, Lauwaet K, Romero CP, Goris B, Bals S, Van Tendeloo G, Lievens P, Van Haesendonck C, Nanoscale \textbf{5}, 3757 (2013).   http://doi.org/10.1039/c3nr33989k

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