[2] Hylleraas E A 1928 Z. Phys. 48 469

[3] Hylleraas E A 1930 Z. Phys. 60 624

[4] Hylleraas E A 1930 Z. Phys. 65 209

[5] L\"{owdin P O 1955 Phys. Rev. 97 1474

[6] L\"{owdin P O 1960 Rev. Mod. Phys. 32 328

[7] Szasz L 1962 Phys. Rev. 126 169

[8] James H M and Coolidge A S 1933 J. Chem. Phys.
1 825

[9] Kolos W et al 1960 Rev. Mod. Phys. 32 205

[10] Kolos W and Wolniewicz L 1964 J. Chem. Phys.
41 3663

[11] L\"{uchow A et al 1993 Int. J. Quant. Chem.
45 445

[12] Levine I N 2000 Quantum Chemistry 5th edn
(Englewood Cliffs, NJ: Prentice-Hall)

[13] Sims J S et al 2002 Int. J. Quant. Chem. 90
1600

[14] Klopper W et al 2006 Int. Rev. Phys. Chem. 25
427

[15] Guseinov I I 2002 Int. J. Quant. Chem. 90 114

[16] Condon E U and Shortley G H 1970 The Theory of
Atomic Spectra (Cambridge: Cambridge University Press)

[17] Guseinov I I 2003 J. Mol. Model. 9 135

[18] Guseinov I I 2006 J. Math. Chem. 39 253

[19] Guseinov I I 2005 J. Math. Chem. 38 489

[20] Guseinov I I, Mamedov B A, And{\ic Z and Cicek S 2008
J. Math. Chem. DOI:10.1007/s10910-008-9352-0

[21] Guseinov I I et al 2008 MATCH (submitted)

[22] Guseinov I I 1998 J. Mol. Struct. (Theochem.)
422 77

[23] Guseinov I I 2003 J. Mol. Model. 9 190

[24] Guseinov I I and Aksu H 2008 Chin. Phys. Lett.
25 896

[25] Guseinov I I 2007 J. Math. Chem. 42 415

[26] Guseinov I I 2008 J. Math. Chem. 43 1024

[27] Guseinov I I 1970 J. Phys. B 3 1399