%% You should probably cite rfc7181 instead of this I-D.
@techreport{ietf-manet-olsrv2-13,
    number =    {draft-ietf-manet-olsrv2-13},
    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-manet-olsrv2/13/},
    author =    {Christopher Dearlove and Philippe Jacquet and Thomas H. Clausen},
    title =     {{The Optimized Link State Routing Protocol version 2}},
    pagetotal = 104,
    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 =  {This document describes version 2 of the Optimized Link State Routing (OLSRv2) protocol for Mobile Ad hoc NETworks (MANETs).},
}