%% You should probably cite rfc9034 instead of this I-D.
@techreport{ietf-6lo-deadline-time-04,
    number =    {draft-ietf-6lo-deadline-time-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-6lo-deadline-time/04/},
    author =    {Lijo Thomas and Satish Anamalamudi and S.V.R Anand and Malati Hegde and Charles E. Perkins},
    title =     {{Packet Delivery Deadline time in 6LoWPAN Routing Header}},
    pagetotal = 18,
    year =      2019,
    month =     mar,
    day =       8,
    abstract =  {This document specifies a new type for the 6LoWPAN routing header containing the deadline time for data packets, designed for use over constrained networks. The deadline time enables forwarding and scheduling decisions for time critical IoT M2M applications that operate within time-synchronized networks that agree on the meaning of the time representations used for the deadline time values.},
}