AMl-MO Study on the Structure and Electron Prpoerties of Squaraine Dyes
Lin Tong, Peng Bi-Xian, Zhong Hong-Peng, Hermn J.Geise
Acta Phys. -Chim. Sin. . 1998, (06): 493 -500 .  DOI: 10.3866/PKU.WHXB19980604