1. Booth, Stephen. Shakespeare’s Sonnets. New Haven UP, 1977.
2. Eggert, Katherine. “Shakespeare and Alchemy.” The Cambridge guide to the worlds of shakespeare, vol. 1: Shakespeare’s world, 1500-1660, edited by Bruce R. Smith. Cambridge: Cambridge University Press, 2016. pp. 309–16.
3. 5. Saving Perfection from the Alchemists: Shakespeare’s Use of Alchemy
4. Kerrigan, John. The sonnets and a lover’s complaint. Harmondsworth: Penguin, 1986.
5. Newton the Alchemist