André Weil, Oeuvres Scientifiques I, p. 291 (in Lettre à Artin, a 1942 letter to Artin, explaining the 1940 Comptes Rendus note Sur les fonctions algébriques à corps de constantes finis)
Griffiths, Phillip; Harris, Joseph (1994). Principles of Algebraic Geometry. Wiley Classics Library. New York, NY: John Wiley & Sons Ltd. pp. 242–3. 0-471-05059-8. Zbl 0836.14001. for a proof in the Riemann surface case
ISBN
Arbarello, E.; De Concini, C.; Kac, V.G. (1989). "The infinite wedge representation and the reciprocity law for algebraic curves". In Ehrenpreis, Leon; Gunning, Robert C. (eds.). Theta functions, Bowdoin 1987. (Proceedings of the 35th Summer Research Institute, Bowdoin Coll., Brunswick/ME July 6-24, 1987). Proceedings of Symposia in Pure Mathematics. Vol. 49. Providence, RI: . pp. 171–190. ISBN 0-8218-1483-4. Zbl 0699.22028.
American Mathematical Society
(1988). Algebraic groups and class fields. Graduate Texts in Mathematics. Vol. 117 (Translation of the French 2nd ed.). New York, etc.: Springer-Verlag. ISBN 3-540-96648-X. Zbl 0703.14001.