%% You should probably cite rfc6987 instead of this I-D.
@techreport{ietf-ospf-rfc3137bis-04,
    number =    {draft-ietf-ospf-rfc3137bis-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-ospf-rfc3137bis/04/},
    author =    {Alvaro Retana and Liem Nguyen and Alex D. Zinin and Russ White and Danny R. McPherson},
    title =     {{OSPF Stub Router Advertisement}},
    pagetotal = 7,
    year =      2013,
    month =     apr,
    day =       23,
    abstract =  {This document describes a backward-compatible technique that may be used by OSPF (Open Shortest Path First) implementations to advertise a router's unavailability to forward transit traffic or to lower the preference level for the paths through such a router. This document obsoletes RFC 3137.},
}