| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Celtic Art in Transition During the First Century BC | 978-963-8046-37-6 (963-8046-37-6) | 2001 |
| The Gaulish Calendar: A reconstruction from the bronze fragments from Coligny with an analysis of its function as a highly accurate lunar/solar of its terminology and development | 978-3-7749-2530-4 (3-7749-2530-5) | 1992 |