فهرس المقالات Padmakar-Ivan index حرية الوصول المقاله صفحة الملخص نص كامل 1 - Topological relationship between electric quadrupole, hexadecapole moments, energy and Padmakar–Ivan index in armchair polyhex nanotubes TUVC6[2p,q] Majid Monajjemi Esmat Mohammadinasab Fatemeh Shafiei