%% You should probably cite rfc1587 instead of this I-D.
@techreport{ietf-ospf-nssa-option-00,
    number =    {draft-ietf-ospf-nssa-option-00},
    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-nssa-option/00/},
    author =    {Rob Coltun and Vince Fuller},
    title =     {{The OSPF NSSA Option}},
    pagetotal = 17,
    year =      1992,
    month =     dec,
    day =       9,
    abstract =  {This document describes a new optional type of OSPF area, somewhat humorously referred to as a "not-so-stubby" area (or NSSA). NSSAs are similar to the existing OSPF stub area configuration option but have the additional capability of importing AS external routes in a limited fashion. {[}STANDARDS-TRACK{]}},
}