%% You should probably cite rfc8505 instead of this I-D.
@techreport{ietf-6lo-rfc6775-update-02,
    number =    {draft-ietf-6lo-rfc6775-update-02},
    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-6lo-rfc6775-update/02/},
    author =    {Pascal Thubert and Erik Nordmark and Samita Chakrabarti},
    title =     {{An Update to 6LoWPAN ND}},
    pagetotal = 26,
    year =      2017,
    month =     apr,
    day =       7,
    abstract =  {This specification updates 6LoWPAN Neighbor Discovery (RFC 6775), to clarify the role of the protocol as a registration technique, simplify the registration operation in 6LoWPAN routers, and provide enhancements to the registration capabilities, in particular for the registration to a Backbone Router for proxy ND operations.},
}