Quantum chemical study of C~4~0, C~4~0^+, Nb@C~4~0^+, NbC~3~9^+, Nb@C~4~0H~4^+
Ge Maofa;Feng Jikang;Cui Meng;Wang Sufan;Tian Weiquan;Huang Xuri;Li Zhiru
Acta Chimica Sinica . 1998, (11): 1063 -1069 .