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Ackermann, Ralf (2003):
Gateways and Components for Supplementary IP Telephony Services in Heterogeneous Environments.
Darmstadt, Technische Universität,
[Ph.D. Thesis]
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Ackermann, Ralf (2003):
Gateways and Components for Supplementary IP Telephony Services in Heterogeneous Environments.
Darmstadt, Technische Universität,
[Ph.D. Thesis]