| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Asterisk Cookbook: Solutions to Everyday Telephony Problems | 978-1-4493-0382-2 | 2011 | Leif Madsen |
| Asterisk: The Definitive Guide | 978-0-596-51734-2 | 2011 | Leif Madsen · Jim Van Meggelen |
| Asterisk: The Definitive Guide: Open Source Telephony for the Enterprise | 978-1-4920-3160-4 | 2019 | Jim Van Meggelen · Leif Madsen |
| Asterisk: The Definitive Guide: The Future of Telephony Is Now | 978-1-4493-3242-6 | 2013 | Leif Madsen · Jim Van Meggelen |