2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/20761We comment on a recent paper [D. Schultz et al, Phys. REv. Lett. 90, 015501 (2003)]. We argue that a highly systematical investigation is needed to determine the most stable structures of both pristine and N-substituted fullerenes.2 figures, submitted to Phys.Rev.LettMaterials Sciencetext