1. Gross, E.K.U., Runge, E., Heinonen, O.: Many-Particle Theory. Hilger, New York (1991)
2. Racah, G.: Phys. Rev. 62, 438 (1942)
3. Condon, E.U., Shortley, G.H.: The Theory of Atomic Spectra. Cambridge Univ. Press, New York (1935)
4. Edmonds, A.R.: Angular Momentum in Quantum Mechanics. Princeton Univ. Press, Princeton (1957)
5. Nielson, C.W., Koster, G.F.: Spectroscopic Coefficients for the pn, dn, and fn Configurations. MIT Press, Cambridge (1963)