1. R. Loudon,The Quantum Theory of Light(Clarendon, Oxford, 1973), Chap. 8.
2. K. Blum,Density Matrix Theory and Applications, 2nd ed. (Plenum, New York, 1996), Chap. 8.
3. B. J. Berne and R. Pecora,Dynamic Light Scattering(Wiley, New York, 1976), Chap. 11.
4. C. Cohen-Tannoudji, J. Dupont-Roc, and G. Grynberg,Atom–Photon Interactions(Wiley, New York, 1992), Chap. IV.
5. S. MukamelPrinciples of Nonlinear Optical Spectroscopy(Oxford University Press, Oxford, 1995), Chap. 6.