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\bibitem{Mueller_etal2005} {\textquotedblleft}\textit{Measurement of the mean inner potential of ZnO nanorods by transmission electron holography}{\textquotedblright}. M{\"u}ller E, Kruse P, Gerthsen D, Schowalter M, Rosenauer A, Lamoen D, Kling R, Waag A, Applied Physics Letters \textbf{86} (2005).   http://doi.org/10.1063/1.1901820

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