Jonathan D. Rosenberg. A Framework for Application Interaction in the Session Initiation Protocol (SIP). RFC, 5629:1-38, October 2009. [doi]
@article{rfc5629, title = {A Framework for Application Interaction in the Session Initiation Protocol (SIP)}, author = {Jonathan D. Rosenberg}, year = {2009}, month = {October}, doi = {10.17487/RFC5629}, url = {https://doi.org/10.17487/RFC5629}, researchr = {https://researchr.org/publication/rfc5629}, cites = {0}, citedby = {0}, journal = {RFC}, volume = {5629}, pages = {1-38}, }