Boyce 1969, p. 24. Boyce, Mary (1969), "On Mithra's Part in Zoroastrianism", Bulletin of the School of Oriental and African Studies, 32 (1): 10–34, doi:10.1017/S0041977X00093678.
cf.Luhrmann 2002, p. 871. Luhrmann, T. M. (2002), "Evil in the Sands of Time: Theology and Identity Politics among the Zoroastrian Parsis", The Journal of Asian Studies, 61 (3): 861–889, doi:10.2307/3096349