Cite
HARVARD Citation
Goncalves, F. et al. (2016) Building Telephony Systems with OpenSIPS - Second Edition. [Online]. Birmingham : Packt Publishing. Available from: http://access.bl.uk/ark:/81055/vdc_100035535011.0x000001
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Goncalves, F. et al. (2016) Building Telephony Systems with OpenSIPS - Second Edition. [Online]. Birmingham : Packt Publishing. Available from: http://access.bl.uk/ark:/81055/vdc_100035535011.0x000001