| title | ISBN-13 (ISBN-10) | year of publication | |
|---|---|---|---|
| Britney for you | 978-3-89719-405-2 (3-89719-405-8) | 2000 | |
| Mobile Strategies: Wireless Business Models, MVNOs and the growth of Mobile Content: Understanding Wireless Business Models, MVNOs and the Growth of Mobile Content | 978-0-9544327-7-5 (0-9544327-7-0) | 2006 |