[1] A.Bither, C.T.Prewitt, J.L.Gillson, P.E.Bierstedt, R.B.Flippen and H.S.Young: Solid State Commun, 1966, 4, 533. [2] R.A.Munson, W.DeSorbo and J.S.Kouvel: J. Chem, Phys.,1967, 47, 1769. [3] M.Kontani, T.Tutui, T.Moriwaka and T.Mizukoshi: PhysicaB, 2000, 284-288, 675. [4] H.Ueda, M.Nohara, K.Kitazawa and H.Takagi: Phys. Rev. B,2002, 65, 155104. [5] M.A.Khan: J. Phys. C: Solid State Phys., 1976, 9, 81. [6] D.W.Bullett: J. Phys. C: Solid State Phys., 1982, 15, 6163. [7] P.Hohenberg and W.Kohn: Phys. Rev. B, 1964, 136, 864. [8] W.Kohn and L.J.Sham: Phys. Rev., 1965, 140, A1133. [9] D.M.Ceperley and B.J.Alder: Phys. Rev, Lett., 1980, 45, 566. [10] J.P.Perdew and A.Zunger: Phys. Rev. B, 1981, 23, 5048. [11] S.G.Louie, K.M.Ho and M.L.Cohen: Phys. Rev. B, 1979, 19,1774. [12] K.M.Ho, C.Elsasser, C.T.Chan and M.Fahnle: J. Phys.: Con-dens. Matter., 1992, 4, 5189. [13] C.Elsasser, N.Takeuchi, K.M.Ho, C.T.Chan and M.Fahnle: J.Phys.: Condens. Matter., 1990, 2, 4371. [14] V.Milman, M.H.Lee and M.C.Payne: Phys. Rev. B, 1994, 49,16300. [15] O.Jepsen and O.K.Anderson: Solid State Commun., 1971, 9,1763. [16] G.Krill, P.Panissod, M.F.Lapierre, F.Gautier, C.Robert andM.N.Eddine: J. Phys. C: Solid State Phys., 1976, 9, 1521. |