@misc{rfc4570,
    series =    {Request for Comments},
    number =    4570,
    howpublished =  {RFC 4570},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC4570},
    url =       {https://www.rfc-editor.org/info/rfc4570},
    author =    {Bob Quinn and Dr. Ross Finlayson},
    title =     {{Session Description Protocol (SDP) Source Filters}},
    pagetotal = 14,
    year =      2006,
    month =     jul,
    abstract =  {This document describes how to adapt the Session Description Protocol (SDP) to express one or more source addresses as a source filter for one or more destination "connection" addresses. It defines the syntax and semantics for an SDP "source-filter" attribute that may reference either IPv4 or IPv6 address(es) as either an inclusive or exclusive source list for either multicast or unicast destinations. In particular, an inclusive source-filter can be used to specify a Source-Specific Multicast (SSM) session. {[}STANDARDS-TRACK{]}},
}