| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Principles of Outer Space Law in Hindsight | 978-0-7923-1350-2 (0-7923-1350-X) | 1991 |
| Public International Air Transportation Law in a New Era:Economic Regulation of International Air Carrier Operations | 978-90-268-0860-9 (90-268-0860-7) | 1976 |