%% You should probably cite rfc1940 instead of this I-D.
@techreport{ietf-sdr-packet-spec-01,
    number =    {draft-ietf-sdr-packet-spec-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-ietf-sdr-packet-spec/01/},
    author =    {Dr. Deborah Estrin and Tony Li and Yakov Rekhter and Kannan Varadhan and Daniel M.A. Zappala},
    title =     {{Source Demand Routing: Packet Format and Forwarding Specification (Version 1)}},
    pagetotal = 27,
    year =      1995,
    month =     oct,
    day =       30,
    abstract =  {The purpose of SDRP is to support source-initiated selection of routes to complement the route selection provided by existing routing protocols for both inter-domain and intra-domain routes. This memo provides information for the Internet community. This memo does not specify an Internet standard of any kind.},
}