James Boswell, Samuel Johnson, Edmond Malone (1824). “The life of Samuel Johnson, LL. D., comprehending an account of his studies, and numerous works, in chronological order: a series of his epistolary correspondence and conversations with many eminent persons; and various original pieces of his composition, never before published; the whole exhibiting a view of literature and literary men in Great Britain, for near half a century during which he flourished”, p.373
"'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.