%% You should probably cite rfc1475 instead of this I-D.
@techreport{ullmann-ipv7-03,
    number =    {draft-ullmann-ipv7-03},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-ullmann-ipv7/03/},
    author =    {Robert L. Ullmann},
    title =     {{TP/IX: The Next Internet}},
    pagetotal = 35,
    year =      1993,
    month =     mar,
    day =       24,
    abstract =  {This memo presents the specification for version 7 of the Internet Protocol, as well as version 7 of the TCP and the user datagram protocol. This memo defines an Experimental Protocol for the Internet community. It does not specify an Internet standard.},
}