%% You should probably cite draft-ietf-softwire-dslite-multicast instead of this I-D.
@techreport{qin-softwire-dslite-multicast-04,
    number =    {draft-qin-softwire-dslite-multicast-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-qin-softwire-dslite-multicast/04/},
    author =    {Qian Wang and Jacni Qin and Mohamed Boucadair and Christian Jacquenet and Yiu Lee},
    title =     {{Multicast Extensions to DS-Lite Technique in Broadband Deployments}},
    pagetotal = 20,
    year =      2011,
    month =     jun,
    day =       13,
    abstract =  {This document proposes a solution for the delivery of multicast service offerings to DS-Lite serviced customers. The proposed solution relies upon a stateless IPv4-in-IPv6 encapsulation scheme and does not require performing any NAT operation along the path used to deliver multicast traffic.},
}