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\bibitem{Bals_etal2007} {\textquotedblleft}\textit{Quantitative three-dimensional reconstruction of catalyst particles for bamboo-like carbon nanotubes}{\textquotedblright}. Bals S, Batenburg J, Verbeeck J, Sijbers J, Van Tendeloo G, Nano letters \textbf{7}, 3669 (2007).   http://doi.org/10.1021/nl071899m

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