%% You should probably cite rfc5438 instead of this I-D.
@techreport{ietf-simple-imdn-10,
    number =    {draft-ietf-simple-imdn-10},
    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-imdn/10/},
    author =    {Eric Burger and Hisham Khartabil},
    title =     {{Instant Message Disposition Notification (IMDN)}},
    pagetotal = 38,
    year =      2008,
    month =     dec,
    day =       8,
    abstract =  {Instant Messaging (IM) refers to the transfer of messages between users in real-time. This document provides a mechanism whereby endpoints can request Instant Message Disposition Notifications (IMDN), including delivery, processing, and display notifications, for page-mode instant messages. The Common Presence and Instant Messaging (CPIM) data format specified in RFC 3862 is extended with new header fields that enable endpoints to request IMDNs. A new message format is also defined to convey IMDNs. This document also describes how SIP entities behave using this extension. {[}STANDARDS-TRACK{]}},
}