▎ 摘　　要

It is shown that armchair edges possess greater aromaticity and cyclic conjugation than do zigzag edges in model nanoribbons. These results are consistent with the zigzag graphene edges being more prone to rapid oxidation when oxygen is present than armchair graphene edges. These results were obtained using Aihara's BRE and Bosanac and Gutman's CCE methods for measuring aromaticity of individual rings. New numerical results are given for three pairs of strongly subspectral series.