| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| The IMS: IP Multimedia Concepts and Services | 978-0-470-72196-4 | 2009 | Georg Mayer |
| The IMS: IP Multimedia Concepts and Services | 978-0-470-01906-1 | 2006 | Aki Niemi · Hisham Khartabil · Georg Mayer |
| The IMS: IP Multimedia Concepts and Services in the Mobile Domain | 978-0-470-87113-3 | 2004 | Georg Mayer · Hisham Khartabil · Aki Niemi |
| Voice over LTE: VoLTE | 978-1-119-95168-1 | 2012 | Harri Holma · Jukka Hongisto · Juha Kallio · Antti Toskala |