1. P. Scherrer, Göttinger Nachrichten, Vol. 2, 1918, p. 98.
2. H. Klug and L. Alexander, X-ray Diffraction Procedures, John Wiley and Sons, New York, 1954, pp. 491–538.
3. L. Bragg, The Crystalline State, Vol. I., A General Survey, G. Bell and Sons, London, 1949, p. 189.
4. Internationale Tabellen zur Bestimmung von Kristallstrukturen, Vol. II, Gebrüder Borntraeger, Berlin, 1935, pp. 588–608.
5. F.W. Jones, “The Measurement of Particle Size by the X-ray Method,” Proc. Roy. Soc. (London), Vol. 166A, 1938, pp. 16–43.