%% You should probably cite draft-ietf-pcp-dslite instead of this I-D.
@techreport{dupont-pcp-dslite-05,
    number =    {draft-dupont-pcp-dslite-05},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-dupont-pcp-dslite/05/},
    author =    {Francis Dupont and Tina Tsou (Ting ZOU) and Jacni Qin and Margaret Cullen and Dacheng Zhang},
    title =     {{The Port Control Protocol in Dual-Stack Lite environments}},
    pagetotal = 6,
    year =      2013,
    month =     apr,
    day =       23,
    abstract =  {This document specifies the so-called "plain mode" for the use of the Port Control Protocol (PCP) in Dual-Stack Lite (DS-Lite) environments.},
}