Theoretical Research on the Structures and Electronic Spectra of Free Radical C69N and Its Dimer (C69N)2
REN Ai-Min, FENG Ji-Kang, TIAN Wei-Quan, SUN Xiu-Yun, GE Mao-Fa, HUANG Xu-Ri, SUN Jia-Zhong
Chem. J. Chinese Universities . 1998, (7): 1131 -1135 .