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Hardy, G. H. (1914). "Sur les zéros de la fonction ζ(s) de Riemann". Comptes rendus de l'Académie des sciences. 158. Paris: 1012–1014. JFM45.0716.04. Reprinted in Borwein, Peter; Choi, Stephen; Rooney, Brendan; Weirathmueller, Andrea, eds. (2008). The Riemann Hypothesis: A Resource for the Afficionado and Virtuoso Alike. CMS Books in Mathematics. New York: Springer. ISBN978-0-387-72125-5.