1. The optical principles of the diffraction of X-rays;James,1965
2. International tables for X-ray crystallography, Vol. III, Table 3.2.2C, p. 171.
3. H.W. Schnopper, Transmission gratings for X-ray lithography, in SSRL Report No. 79/02, Lithography/microscopy beam line design workshop.
4. T.W. Barbee, Jr. and D.L. Keith, Layered synthetic microstructures: Application as X-ray dispersive elements, ibid.