%% You should probably cite rfc6091 instead of this I-D.
@techreport{mavrogiannopoulos-rfc5081bis-09,
    number =    {draft-mavrogiannopoulos-rfc5081bis-09},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-mavrogiannopoulos-rfc5081bis/09/},
    author =    {Nikos Mavrogiannopoulos and Daniel Kahn Gillmor},
    title =     {{Using OpenPGP Keys for Transport Layer Security (TLS) Authentication}},
    pagetotal = 9,
    year =      2010,
    month =     oct,
    day =       4,
    abstract =  {This memo defines Transport Layer Security (TLS) extensions and associated semantics that allow clients and servers to negotiate the use of OpenPGP certificates for a TLS session, and specifies how to transport OpenPGP certificates via TLS. It also defines the registry for non-X.509 certificate types. This document is not an Internet Standards Track specification; it is published for informational purposes.},
}