- Political Theories of the Middle Age (Cambridge Paperback Library)
- Natural Law and the Theory of Society 1500-1800
- Die Soziale Aufgabe Des Privatrechts: Vortrag Gehalten Am 5. April 1889 in Der Juristischen Gesellschaft Zu Wien
- Das Deutsche Genossenschaftsrecht
- Associations and Law: The Classical and Early Christian Stages








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