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@inproceedings{SFJP99, author = {Burkhard Stiller and George Fankhauser and Gabriela Joller and Peter Reichl and Nathalie Weiler}, title = {Open Charging and QoS Interfaces for IP Telephony}, address = {San Jose, California, USA}, booktitle = {The Internet Summit (INET 99)}, month = {Jun}, year = {1999} }