Eleven International Publishing · St. Benno
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| International Air Law and ICAO | 978-90-77596-54-8 (90-77596-54-2) | 2008 |
| International Air Law and ICAO: Third Edition | 978-94-6236-619-0 (94-6236-619-5) | 2016 |
| Was Tobias auf seiner Reise erlebt | 978-3-7462-0122-1 (3-7462-0122-5) | 1986 |