%% You should probably cite rfc2556 instead of this I-D.
@techreport{bradner-1240.his-01,
    number =    {draft-bradner-1240.his-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-bradner-1240.his/01/},
    author =    {Scott O. Bradner},
    title =     {{OSI connectionless transport services on top of UDP Applicability Statement for Historic Status}},
    pagetotal = 4,
    year =      1999,
    month =     jan,
    day =       18,
    abstract =  {RFC 1240, "OSI connectionless transport services on top of UDP", was published as a Proposed Standard in June 1991 but at this time there do not seem to be any implementations which follow RFC 1240. In addition there is a growing concern over using UDP-based transport protocols in environments where congestion is a possibility This memo provides information for the Internet community.},
}