Albert Einstein (2015). “Bite-Size Einstein: Quotations on Just About Everything from the Greatest Mind of the Twentieth Century”, p.15, St. Martin's Press
Fyodor Dostoevsky (2013). “The Greatest Works of Dostoevsky: Crime and Punishment + The Brother's Karamazov + The Idiot + Notes from Underground + The Gambler + Demons (The Possessed / The Devils)”, p.598, e-artnow