Cite
APA Citation
Unknown (2009). SIP handbook : services, technologies, and security of Session Initiation Protocol. Boca Raton, FL : CRC Press. http://access.bl.uk/ark:/81055/vdc_100045501058.0x000001
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Unknown (2009). SIP handbook : services, technologies, and security of Session Initiation Protocol. Boca Raton, FL : CRC Press. http://access.bl.uk/ark:/81055/vdc_100045501058.0x000001