Cf. (en) Noel Malcolm et Jacqueline Stedall, John Pell (1611-1685) and His Correspondence with Sir Charles Cavendish. The Mental World of an Early Modern Mathematician, Oxford, Oxford University Press, , 664 p. (ISBN0-19-856484-8, lire en ligne), p. 77.
rutgers.edu
math.rutgers.edu
Cf. la notice sur Leibnitz du département de mathématiques de l'Université Rutgers
