Geschichte der Gleichung t² - Du² = 1.

Available on demand as hard copy or computer file from Cornell University Library.

Vorlesungen über zahlentheorie; einführung in die theorie der algebraischen zahlkörper.

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Elemente der Zahlentheorie.

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Gli elementi della teoria dei numeri.

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Introduction à l'étude de la théorie des nombres et de l'algèbre supérieure

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Introduction à la théorie des nombres algébriques.

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Introduction à la théorie des nombres transcendants, et des propriétés arithmétiques des fonctions.

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Ausgewählte kapitel der zahlentheorie...

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Sur les principes fondamentaux de la théorie des nombres et de la géométrie,

At head of title: Scientia, juin 1902.

Sur les groupes du degré p et de l'ordre p(p1̲)[pi], p étant un nombre premier et [pi] un diviseur de p-1.

Videnskabsselskabet. Skrifter, M.-N. Kl., 1897, no. 9.

Algebra, mit einschluss der elementaren zahlentheorie,

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Elliptische functionen und algebraische zahlen. Academische vorlesungen

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Vorlesungen über allgemeine arithmetik, nach den neueren ansichten.

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The structure of arithmetic and algebra.

Mode of access: Internet.

Recherches arithmétiques,

Mode of access: Internet.