@misc{rfc4245,
    series =    {Request for Comments},
    number =    4245,
    howpublished =  {RFC 4245},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC4245},
    url =       {https://www.rfc-editor.org/info/rfc4245/},
    author =    {O. Levin and R. Even},
    title =     {{High-Level Requirements for Tightly Coupled SIP Conferencing}},
    pagetotal = 12,
    year =      2005,
    month =     nov,
    abstract =  {This document examines a wide range of conferencing requirements for tightly coupled SIP conferences. Separate documents will map the requirements to existing protocol primitives, define new protocol extensions, and introduce new protocols as needed. Together, these documents will provide a guide for building interoperable SIP conferencing applications. This memo provides information for the Internet community.},
}