Theoretical Studies of Spectra of the Excited States and Conversion Barriers of a State to State HCB and HCB-
Cao Ze-Xing, Tian An-Min, Yan Guo-Sen
Acta Phys. -Chim. Sin. . 1994, (05): 387 -390 .  DOI: 10.3866/PKU.WHXB19940502