%% You should probably cite draft-boucadair-softwire-dslite-v6only instead of this I-D.
@techreport{boucadair-dslite-interco-v4v6-04,
    number =    {draft-boucadair-dslite-interco-v4v6-04},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-boucadair-dslite-interco-v4v6/04/},
    author =    {Mohamed Boucadair and Christian Jacquenet and Jean-Luc Grimault and Mohamed Kassi-Lahlou and Pierre Levis and Dean Cheng and Yiu Lee},
    title =     {{Deploying Dual-Stack Lite in IPv6 Network}},
    pagetotal = 17,
    year =      2010,
    month =     jul,
    day =       11,
    abstract =  {Dual-Stack lite requires that the AFTR must have IPv4 connectivity. This forbids a service provider who wants to deploy AFTR in an IPv6- only network. This memo proposes an extension to implement a stateless IPv4-in-IPv6 encapsulation in the AFTR so that AFTR can be deployed in an IPv6-only network.},
}