1. G.E. Bacon: Neutron Diffraction, 3rd edn. (Clarendon, Oxford 1975)
2. W.L. Whittemore: Inelastic Scattering of Neutrons, Proc. Symp., Bombay (1964) IAEA Vienna 2, 314 (1965)
3. B.N. Brockhouse, S. Hauteder, H. Stiller: In Interaction of Radiation with Solids ed. by Strumane et al. (North-Holland 1963)
4. L. Van Hove: Phys. Rev. 95, 249 (1954)
5. G.H. Vineyard: Phys. Rev. 110, 990 (1968)