This is a list of some references and links related to Hilbert's second problem.
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1976 G. Kreisel: What we have learnt form Hilbert's second problem? Proceedings of the Symposium in Pure Mathematics of the American Mathematical Society, Held at Northern Illinois University 1974, (edited by F.E.Browder), 93-130.
1900 D. Hilbert: Die Widerspruchslosigkeit der arithmetischen Axiome. Akad. Wiss. Göttingen 1900, 264-266. English Translation