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\bibitem{Bernaerts_etal1995} {\textquotedblleft}\textit{Electron microscopy study of coiled carbon tubules}{\textquotedblright}. Bernaerts D, Zhang XB, Zhang XF, Amelinckx S, Van Tendeloo G, van Landuyt J, Ivanov V, Nagy JB, Philosophical magazine: A: physics of condensed matter: defects and mechanical properties \textbf{71}, 605 (1995).   http://doi.org/10.1080/01418619508244470

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