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\bibitem{Amelinckx_etal1995} {\textquotedblleft}\textit{A structure model and growth mechanism for multishell carbon nanotubes}{\textquotedblright}. Amelinckx S, Bernaerts D, Zhang XB, Van Tendeloo G, van Landuyt J, Science \textbf{267}, 1334 (1995).   http://doi.org/10.1126/science.267.5202.1334

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