1. [AKM] Arbeitskreis Meteore e.V: http://www.meteoros.de/
2. [Boh95] C.F. Bohren, Encyclopedia of Applied Physics 12, 405 (1995)
3. [Cowley] Les Cowley: www.sundog.clara.co.uk/
4. [Cow05] L. Cowley, P. Laven, M.Vollmer, Rings Around the Sun and Moon: Coronae and Diffraction, Physics Education 40/1, 51–59 (2005)
5. [Die57] G. Dietze, Einführung in die Optik der Atmosphäre, Akad.Verlagsges., Leipzig (1957)