| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Introduction to Telecom Billing, Usage Events, Call Detail Records, and Billing Cycles | 978-0-9742787-4-2 (0-9742787-4-2) | 2004 | Mr. Lawrence Harte |
| Telecom Systems, PSTN, PBX, Datacom, IP Telephony, IPTV, Wireless and Billing | 978-0-9728053-9-1 (0-9728053-9-7) | 2006 | " |