%% You should probably cite rfc7428 instead of this I-D.
@techreport{ietf-6lo-lowpanz-01,
    number =    {draft-ietf-6lo-lowpanz-01},
    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-lowpanz/01/},
    author =    {Anders Brandt and Jakob Buron},
    title =     {{Transmission of IPv6 packets over ITU-T G.9959 Networks}},
    pagetotal = 15,
    year =      2014,
    month =     jan,
    day =       21,
    abstract =  {This document describes the frame format for transmission of IPv6 packets and a method of forming IPv6 link-local addresses and statelessly autoconfigured IPv6 addresses on ITU-T G.9959 networks.},
}