1. R. M. BRUGGER, Thermal Neutron Scattering, P. A. EGELSTAFF, Ed., p. 54, Academic Press, London (1965).
2. P. K. IYENGAR, Thermal Neutron Scattering, P. A. EGELSTAFF, Ed., p. 98, Academic Press, London (1965).
3. D. J. HUGHES, Neutron Optics, pp. 25 and 45, Inter science Publishers, New York (1954).
4. Theory of the Refraction and the Diffraction of Neutrons by Crystals
5. The use of neutron optical devices on beam-hole experiments on beam-hole experiments