%% You should probably cite rfc6778 instead of this I-D.
@techreport{sparks-genarea-mailarch-05,
    number =    {draft-sparks-genarea-mailarch-05},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-sparks-genarea-mailarch/05/},
    author =    {Robert Sparks},
    title =     {{IETF Email List Archiving, Web-based Browsing and Search Tool Requirements}},
    pagetotal = 9,
    year =      2012,
    month =     feb,
    day =       29,
    abstract =  {The IETF makes heavy use of email lists to conduct its work. Participants frequently need to search and browse the archives of these lists, and have asked for improved search capabilities. The current archive mechanism could also be made more efficient. This memo captures the requirements for improved email list archiving and searching systems.},
}