%% You should probably cite rfc2529 instead of this I-D.
@techreport{ietf-ipngwg-6over4-02,
    number =    {draft-ietf-ipngwg-6over4-02},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-ietf-ipngwg-6over4/02/},
    author =    {Cyndi Jung and Brian E. Carpenter},
    title =     {{Transmission of IPv6 over IPv4 Domains without Explicit Tunnels}},
    pagetotal = 10,
    year =      1999,
    month =     jan,
    day =       19,
    abstract =  {This memo specifies the frame format for transmission of IPv6 (IPV6) packets and the method of forming IPv6 link-local addresses over IPv4 domains. It also specifies the content of the Source/Target Link-layer Address option used in the Router Solicitation, Router Advertisement, Neighbor Solicitation, and Neighbor Advertisement and Redirect messages, when those messages are transmitted on an IPv4 multicast network. {[}STANDARDS-TRACK{]}},
}