- A History of Mediaeval Jewish Philosophy
- Der Zweck im Recht
- Judah Messer Leon's Commentary on the "Vetus Logica" with a glossary of Hebrew logical and philosophical terms
- Judah Messer Leon's Commentary On the Vetus Logica,: A Study Based On Three Mss., With a Glossary of Hebrew Logical and Philosophical Terms
- Matter and form in Aristotle: a rejoinder