Uriel Levy, Shrot, Yoav , Marom, Emanuel , and Mendlovic, David . 2001. “On-Axis Centro-Symmetric Computer Generated Holograms”. Applied Optics, 40, 32, Pp. 5928-5937. https://www.osapublishing.org/ao/abstract.cfm?uri=ao-40-32-5928.