Low-Cost Synthesis of Fullerene Derivatives -[using refined mixed fullerenes instead of pure C60 as starting material]. -(CHOUNTOULESI, E.; MITZITHRA, C.; HAMILAKIS*, S.; KORDATOS, K.; KOLLIA, C.; LOIZOS, Z.; Synth. Commun. 43 (2013) 15, 2042-2049, http://dx.