%% You should probably cite rfc7544 instead of this I-D.
@techreport{mohali-rfc6044bis-01,
    number =    {draft-mohali-rfc6044bis-01},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-mohali-rfc6044bis/01/},
    author =    {Marianne Mohali},
    title =     {{Mapping and interworking of Diversion information Between Diversion and History-Info Headers in the Session Initiation Protocol (SIP)}},
    pagetotal = 26,
    year =      2015,
    month =     feb,
    day =       18,
    abstract =  {Although the SIP History-Info header field is the solution adopted in IETF, the non-standard Diversion header field is nevertheless already implemented and used for conveying call diversion related information in the Session Initiation Protocol (SIP) signaling. On one hand, the non-standard Diversion header field is described, as Historic, in {[}RFC5806{]}. On the other hand, the History-Info header field is described in {[}RFC7044{]} that obsoletes the original{[}RFC4244{]} describing the History-Info header field. {[}RFC7044{]} defines the SIP header field, History-Info, for capturing the history information in requests and new SIP header field parameters for the History-Info and Contact header fields to tag the method by which the target of a request is determined. {[}RFC7044{]} also defines a value for the Privacy header field that directs the anonymization of values in the History-Info header field. Since the Diversion header field is used in existing network implementations for the transport of call diversion information, its interworking with the SIP History-Info standardized solution is needed. This document describes a recommended interworking guideline between the Diversion header field and the History-Info header field to handle call diversion information. In addition, an interworking policy is proposed to manage the headers' coexistence. This work is intended to enable the migration from non-standard implementations and deployments toward IETF specification-based implementations and deployments. This document obsoletes {[}RFC6044{]}that describes the interworking between the Diversion header field {[}RFC5806{]} and the obsoleted History-Info header field as defined on {[}RFC4244{]}.},
}