Joseph Addison (1858). “Works, Including the Whole Contents of Bp. Hurd's Edition: Withletters and Other Pieces Not Found in Any Previous Collection; and Macaulay's Essay on His Life and Works”, p.530
"Eli Roth Exclusive Interview THE LAST EXORCISM; Plus Updates on FUNHOUSE 3D, MAN WITH THE IRON FIST, ENDANGERED SPECIES, More". Interview with Christina Radish, collider.com. August 25, 2010.
"'La logique et l'intuition dans la science mathématique et dans l'enseignement' ('Logic and intuition in the science of mathematics and in teaching')". Book by Henri Poincare, 1899.