1. Vosselman, G. and H. G. Maas ,Airborne and Terrestrial Laser Scanning 2010, CRC Press, Taylor & Francis Group, Boca Raton (2010).
2. RIEGL LMS-Q680i,” 20 September 2010, www.riegl.com (27 February 2012).
3. IEEE, 686–1997 IEEE Standard Radar Definitions, IEEE Publishing (1998).
4. Ridenour, L. , “Radar system engineering,”Radiation Laboratory Series, Vol. 1, McGraw-Hill, New York (1947).