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\bibitem{Cabana_etal2015} {\textquotedblleft}\textit{The role of steam treatment on the structure, purity and length distribution of multi-walled carbon nanotubes}{\textquotedblright}. Cabana L, Ke X, Kepi{\'c} D, Oro-Sol{\'e} J, Tob{\'\i}as-Rossell E, Van Tendeloo G, Tobias G, Carbon \textbf{93}, 1059 (2015).   http://doi.org/10.1016/j.carbon.2015.06.027

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