%% You should probably cite draft-ietf-lpwan-schc-over-sigfox instead of this I-D.
@techreport{zuniga-lpwan-schc-over-sigfox-04,
    number =    {draft-zuniga-lpwan-schc-over-sigfox-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-zuniga-lpwan-schc-over-sigfox/04/},
    author =    {Juan-Carlos Zúñiga and Carles Gomez and Laurent Toutain},
    title =     {{SCHC over Sigfox LPWAN}},
    pagetotal = 9,
    year =      ** No value found for 'doc.pub_date.year' **,
    month =     ** No value found for 'doc.pub_date' **,
    day =       ** No value found for 'doc.pub_date.day' **,
    abstract =  {The Static Context Header Compression (SCHC) specification describes a header compression scheme and a fragmentation functionality for Low Power Wide Area Network (LPWAN) technologies. SCHC offers a great level of flexibility that can be tailored for different LPWAN technologies. The present document provides the optimal parameters and modes of operation when SCHC is implemented over a Sigfox LPWAN.},
}