[2] Parr R G,Yang W.Density-Functional Theory of Atoms and Molecules,Oxford:Oxford University Press,1989.

[3] Salahub D R,Zerner M C.The Challenge of d and f Electrons,ACS,Washington,D.C,1989.

[4] Hehre W J,Radom L,Pople J A.Ab Initio Molecular Orbital Theory.New York:John Wiley & Sons.,1986.227.