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\bibitem{Michel_etal2007} {\textquotedblleft}\textit{Superposition of quantum and classical rotational motions in Sc$_{2}$C$_{2}$@C$_{84}$ fullerite}{\textquotedblright}. Michel KH, Verberck B, Hulman M, Kuzmany H, Krause M, The journal of chemical physics \textbf{126}, 064304 (2007).   http://doi.org/10.1063/1.2434175

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