%% You should probably cite rfc2310 instead of this I-D.
@techreport{holtman-http-safe-02,
    number =    {draft-holtman-http-safe-02},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-holtman-http-safe/02/},
    author =    {Koen Holtman},
    title =     {{The Safe Response Header Field}},
    pagetotal = 5,
    year =      1997,
    month =     aug,
    day =       1,
    abstract =  {This document defines a HTTP response header field called Safe, which can be used to indicate that repeating a HTTP request is safe. Such an indication will allow user agents to handle retries of some safe requests, in particular safe POST requests, in a more user-friendly way.},
}