%% You should probably cite rfc6714 instead of this I-D.
@techreport{ietf-simple-msrp-cema-04,
    number =    {draft-ietf-simple-msrp-cema-04},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-ietf-simple-msrp-cema/04/},
    author =    {Christer Holmberg and Staffan Blau and Eric Burger},
    title =     {{Connection Establishment for Media Anchoring (CEMA) for the Message Session Relay Protocol (MSRP)}},
    pagetotal = 21,
    year =      2012,
    month =     apr,
    day =       17,
    abstract =  {This document defines a Message Session Relay Protocol (MSRP) extension, Connection Establishment for Media Anchoring (CEMA). Support of the extension is optional. The extension allows middleboxes to anchor the MSRP connection, without the need for middleboxes to modify the MSRP messages, and thus also enables a secure end-to-end MSRP communication in networks where such middleboxes are deployed. The document also defines a Session Description Protocol (SDP) attribute, 'msrp-cema', that MSRP endpoints use to indicate support of the CEMA extension.},
}