1. P.A.Fleury, S.P.S.Porto, L.E.Cheeseman, H.J.Guggenheim: Phys. Rev. Lett. 17, 84–87 (1966)
2. See, for example, the review by W.Hayes, R.Loudon: Scattering of Light by Crystals (Wiley-Interscience, New York 1978) Chap. 7, pp. 288–292. The first observation of electronic Raman scattering from a rare-earth ion was made in this laboratory in 1963 [J. T. Hougen, S. Singh: Phys. Rev. Lett. 10, 406–407 (1963)]
3. D.J.Lockwood: “Raman Spectra of Cadmium Chloride and Cadmium Bromide”, in Light Scattering Spectra of Solids, ed. by G. B.Wright (Springer, Berlin, Heidelberg, New York 1969) pp. 75–84; D.J. Lockwood, J.H. Christie: Paper presented at the 2nd Int. Conf. on Raman Spectroscopy, Oxford, Sept. 13–17 (1970)
4. P.A.Fleury: Int. J. Magnetism 1, 75–83 (1970)
5. S.R.Chinn, R.W.Davies, H.J.Zeiger: “Recent Topics in Two-Magnon Optical Raman Scattering”, in Am. Inst. Phys. Conf. Proc., Vol. 5 (1972) pp. 317–336