1. Altman F. E., 1956, US patent No. 2 742 817.
2. Altman N. G., 1968, paper presented at SPSE on: Fundamentals and Applications of Microphotography.
3. Diffraction of Electromagnetic Waves by an Aperture in a Large Screen
4. The Encyclopedia of Physics;Besançon,1974
5. Vacuum ultraviolet holography