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\bibitem{Lamoen+Michel1993} {\textquotedblleft}\textit{Crystal field and molecular structure of solid C$_{60}$}{\textquotedblright}. Lamoen D, Michel KH, Zeitschrift f{\"u}r Physik : B : condensed matter \textbf{92}, 323 (1993).   http://doi.org/10.1007/BF01308749

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