%% You should probably cite rfc6251 instead of this I-D.
@techreport{josefsson-kerberos5-starttls-09,
    number =    {draft-josefsson-kerberos5-starttls-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-josefsson-kerberos5-starttls/09/},
    author =    {Simon Josefsson},
    title =     {{Using Kerberos Version 5 over the Transport Layer Security (TLS) Protocol}},
    pagetotal = 8,
    year =      2010,
    month =     aug,
    day =       13,
    abstract =  {This document specifies how the Kerberos V5 protocol can be transported over the Transport Layer Security (TLS) protocol in order to provide additional security features. This document is not an Internet Standards Track specification; it is published for informational purposes.},
}