Margenau,H., Kestner,N.R.: Theory of intermolecular forces. Oxford: Pergamon Press 1969
Brooks,F.C.: Phys. Rev.86, 92 (1952)
Coulson,C.A.: Proc. Roy. Soc. (Edinburgh)A61, 20 (1941)
Dalgarno,A., Lynn,N.: Proc. Phys. Soc.A70, 223 (1957)
Carlson,B.C., Rushbrooke,G.S.: Proc. Cambridge Phil. Soc.46, 626 (1950)
Fontana,P.R.: Phys. Rev.123, 1865 (1961);123, 1871 (1961); see also Ref. [1]
Kato,T.: J. Fac. Sci. Tokyo Univ. Sect. I,6, 145 (1951)
Ahlrichs,R.: Chem. Phys. Letters15, 609 (1972);18, 521 (1972)
O'Connor,A.: Comm. Math. Phys.32, 319 (1973)
Ahlrichs,R.: J. Math. Phys.14, 1860 (1973)
Combes,J.M.: Nuove CimentoA64, 111 (1969)
Weinstein,D.H.: Proc. Nat. Acad. Sci. U.S.20, 529 (1934)
Claverie,P.: Int. J. Quantum Chem.5, 273 (1971)
Musher,J.I., Amos,A.T.: Phys. Rev.164, 31 (1967)
Herring,C., Flicker,M.: Phys. Rev.134, A 362 (1964)
