1. H. S. Peiser, in: X-Ray Diffraction by Poly-Materials, Institute of Physics, 1960, p. 64.
2. Kurt Togel, “Vacuum X-ray Fluorescence Analysis for Elements with Atomic Number between 12 and 22,” Siemens-Rev. 28 (5): 153, 1961.
3. N. Spielberg, “Tube Target and Inherent Filtration as Factors in Fluorescence Excitation of X-Rays,” J. Appl. Phys. 33 (6): 2033, 1962.
4. B. D. Cullity, Elements of X-Ray Diffraction, Addison-Wesley, Reading 1956, p. 6.
5. B. D. Cullity, ibid. p. 7.