| title | media type | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|---|
| An Historical Introduction to Western Constitutional Law | Hardcover | 978-0-521-47115-2 (0-521-47115-X) | 1995 |
| An Historical Introduction to Western Constitutional Law | Paperback | 978-0-521-47693-5 (0-521-47693-3) | 1995 |
| European Law in the Past and the Future: Unity and Diversity over Two Millennia | Hardcover | 978-0-521-80938-2 (0-521-80938-X) | 2001 |