Beck, Roger. “Dorian Gieseler Greenbaum, The Daimon in Hellenistic Astrology: Origins and Influence”. Journal for the Study of Religion, Nature and Culture 13, no. 1 (May 8, 2019): 98–100. Accessed August 14, 2024. https://journal.equinoxpub.com/JSRNC/article/view/11852.