%% You should probably cite rfc3104 instead of this I-D.
@techreport{ietf-nat-rsip-ipsec-04,
    number =    {draft-ietf-nat-rsip-ipsec-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-ietf-nat-rsip-ipsec/04/},
    author =    {Michael Borella and Gabriel Montenegro},
    title =     {{RSIP Support for End-to-end IPsec}},
    pagetotal = 19,
    year =      2000,
    month =     jul,
    day =       20,
    abstract =  {This document proposes mechanisms that enable Realm Specific IP (RSIP) to handle end-to-end IPsec (IP Security). This memo defines an Experimental Protocol for the Internet community.},
}