"'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.
Samuel Johnson (1823). “The Works of Samuel Johnson: LL.D. A New Edition in Twelve Volumes. With an Essay on His Life and Genius, by Arthur Murphy, Esq”, p.76