"Madalyn Aslan's Jupiter Signs: How to Improve Your Luck, Career, Health, Finances, Appearance, and Relationships Through the New Astrology". Book by Madalyn Aslan, 2003.
"David S. Goyer Explains His ‘Graphic Novel’ Approach to Renaissance Intrigue in ‘Da Vinci’s Demons’". Interview with Alison Willmore, www.indiewire.com. April 9, 2013.
Percy Bysshe Shelley (1830). “The Beauties of Percy Bysshe Shelley, Consisting of Miscellaneous Selections from His Poetical Works, the Entire Poems of Adonais and Alastor, and a Revised Edition of Queen Mab ... With a Biographical Preface. Second Edition”, p.32