1 2 This article incorporates text from a publication now in the public domain: Coolidge, William Augustus Brevoort (1911). "Grenoble." In Chisholm, Hugh (ed.). Encyclopædia Britannica. 12 (11th ed.). Cambridge University Press. pp. 579–580.
1 2 Graff, James (22 August 2004). "Secret Capitals". Time. New York. สืบค้นเมื่อ 29 October 2009.
