%% You should probably cite rfc8200 instead of this I-D.
@techreport{ietf-6man-rfc2460bis-13,
    number =    {draft-ietf-6man-rfc2460bis-13},
    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-6man-rfc2460bis/13/},
    author =    {Dr. Steve E. Deering and Bob Hinden},
    title =     {{Internet Protocol, Version 6 (IPv6) Specification}},
    pagetotal = 42,
    year =      2017,
    month =     may,
    day =       19,
    abstract =  {This document specifies version 6 of the Internet Protocol (IPv6). It obsoletes RFC 2460.},
}