%% You should probably cite rfc7598 instead of this I-D.
@techreport{ietf-softwire-map-dhcp-04,
    number =    {draft-ietf-softwire-map-dhcp-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-softwire-map-dhcp/04/},
    author =    {Tomek Mrugalski and Xiaohong Deng and Ole Trøan and Congxiao Bao and Wojciech Dec and Leaf Yeh},
    title =     {{DHCPv6 Options for configuration of Softwire Address and Port Mapped Clients}},
    pagetotal = 20,
    year =      2013,
    month =     jul,
    day =       15,
    abstract =  {This document specifies DHCPv6 options, termed Softwire46 options, for the provisioning of Softwire46 Customer Edge (CE) devices. Softwire46 is a collective term used to refer to architectures based on the notion of IPv4 Address+Port (A+P) for providing IPv4 connectivity across an IPv6 network, as specified by the IETF Softwires Working Group, including those where the IPv4 A+P parameters are optionally derived from the CE's IPv6 network prefix by algorithmic means.},
}