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\bibitem{Colomer_etal2001} {\textquotedblleft}\textit{Electron diffraction study of small bundles of single-wall carbon nanotubes with unique helicity}{\textquotedblright}. Colomer J-F, Henrard L, Lambin P, Van Tendeloo G, Physical review : B : condensed matter and materials physics \textbf{64}, 125425 (2001).   http://doi.org/10.1103/PhysRevB.64.125425

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