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\bibitem{Kneller_etal2000} {\textquotedblleft}\textit{TEM and laser-polarized $^{129}$Xe NMR characterization of oxidatively purified carbon nanotubes}{\textquotedblright}. Kneller JM, Soto RJ, Surber SE, Colomer JF, Fonseca A, Nagy JB, Van Tendeloo G, Pietrass T, Journal of the American Chemical Society \textbf{122}, 10591 (2000).   http://doi.org/10.1021/ja994441y

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