- The 46° halo was first explained as being caused by refractions through ice crystals in 1679 by the French physicist Edmé Mariotte (1620–1684). See: Mariotte, Quatrieme Essay. De la Nature des Couleur (Paris, France: Estienne Michallet, 1681). Sun dogs as well as the 22° and 46° halos are explained in terms of refractions from ice crystals on pages 466 - 524.
- 46°-halo. Arbeitskreis Meteore e.V. [2007-04-16]. （原始内容存档于31 March 2007）.
- Les Cowley (?). 46° Halo Formation. Atmospheric Optics. [2007-04-16]. (including an illustration and an animation)