THE UNITARY GROUP APPOACH (UGA) TO THE WEAK FIELD MODEL OF A LIGAND FIELD (dN IONS)
Wen Zhenyi*; Wang Yubin; Dou Yusheng; Liu Zhaomeng
Acta Phys. -Chim. Sin. . 1988, (06): 566 -571 .  DOI: 10.3866/PKU.WHXB19880602