1. James, R.W., “The Optical Principles of the Diffraction of X-Rays”, Cornell Univ. Press, p. 41 (1965).
2. Azaroff, L.V., Acta Cryst. 8, pp. 701–704 (1955).
3. Jenkins, R., Norelco Reporter 21, No. 1, pp. 9–14 (1974).
4. International Tables for X-Ray Crystallography, Vol. IV, Table 2.2B, p. 99 (1974).
5. James, R.W., Ibid, p. 109.