Karl Egil Aubert. Relations généralisées et indépendance logique des notions de réflexivité, symétrie et transitivité. Comptes rendus hebdomadaires des séances de l'Académie des Sciences (Paris), vol. 229 (1949), pp. 538–540. - J. Richard Büchi. Investigation of the equivalence of the axiom of choice and Zorn's lemma from the viewpoint of the hierarchy of types. The journal of symbolic logic, vol. 18 (1953), pp. 125–135.

Paul Bernays

doi:10.2307/2267738

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Karl Egil Aubert. Relations généralisées et indépendance logique des notions de réflexivité, symétrie et transitivité. Comptes rendus hebdomadaires des séances de l'Académie des Sciences (Paris), vol. 229 (1949), pp. 538–540. - J. Richard Büchi. Investigation of the equivalence of the axiom of choice and Zorn's lemma from the viewpoint of the hierarchy of types. The journal of symbolic logic, vol. 18 (1953), pp. 125–135.

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Karl Egil Aubert. Relations généralisées et indépendance logique des notions de réflexivité, symétrie et transitivité. Comptes rendus hebdomadaires des séances de l'Académie des Sciences (Paris), vol. 229 (1949), pp. 538–540. - J. Richard Büchi. Investigation of the equivalence of the axiom of choice and Zorn's lemma from the viewpoint of the hierarchy of types. The journal of symbolic logic, vol. 18 (1953), pp. 125–135.

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Karl Egil Aubert. Relations généralisées et indépendance logique des notions de réflexivité, symétrie et transitivité. Comptes rendus hebdomadaires des séances de l'Académie des Sciences (Paris), vol. 229 (1949), pp. 538–540. - J. Richard Büchi. Investigation of the equivalence of the axiom of choice and Zorn's lemma from the viewpoint of the hierarchy of types. The journal of symbolic logic, vol. 18 (1953), pp. 125–135.

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