1. Heraclitus. Brooks Haxton (trans) (2000) Fragments: the wisdom of Heraclitus. Fragment 90. Viking Press, New York
2. Hippocrates. Jones WHS (trans) (1923) On dreams. Loeb Classical Library, vol. IV. Harvard University Press, Cambridge, MA
3. Gallop D (1991) Aristotle on sleep and dreams. Broadview Press, Peterborough
4. Virgil DJ (trans) (2014) The Aeneid. Book V. Harvard Classics, Harvard
5. Fyodor Dostoyewsky. Garnett C (trans) (2005) The Brothers Karamazov. Dover Publications, Mineola, p 790