%% You should probably cite rfc2831 instead of this I-D.
@techreport{leach-digest-sasl-04,
    number =    {draft-leach-digest-sasl-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-leach-digest-sasl/04/},
    author =    {Paul J. Leach and Chris Newman},
    title =     {{Using Digest Authentication as a SASL Mechanism}},
    pagetotal = 27,
    year =      1999,
    month =     sep,
    day =       28,
    abstract =  {This specification defines how HTTP Digest Authentication can be used as a SASL mechanism for any protocol that has a SASL (Simple Authentication and Security Layer) profile. {[}STANDARDS-TRACK{]}},
}