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\bibitem{Verberck+Michel2007} {\textquotedblleft}\textit{Anisotropic packing of C-70 molecules in carbon nanotubes}{\textquotedblright}. Verberck B, Michel KH, Physica status solidi B-basic solid state physics \textbf{244}, 4279 (2007).   http://doi.org/10.1002/pssb.200776144

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