Joyce B. Mwangama, Vitalis G. Ozianyi, Neco Ventura. Charging and Billing for Composite Services in a Multi-Service Provider Environment: The IMS Case. In 2010 IEEE Wireless Communications and Networking Conference, WCNC 2010, Proceedings, Sydney, Australia, 18-21 April 2010. pages 1-6, IEEE, 2010. [doi]
Abstract is missing.