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\bibitem{Pauwels_etal1999} {\textquotedblleft}\textit{Electron microscopy on nanoparticles: structure of C$_{60}$ and C$_{70}$ nanopraticles}{\textquotedblright}. Pauwels B, Van Tendeloo G, Joutsensaari J, Kauppinen EI,  (1999)

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