%% You should probably cite draft-ietf-tls-tls13-pkcs1 instead of this I-D.
@techreport{davidben-tls13-pkcs1-00,
    number =    {draft-davidben-tls13-pkcs1-00},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-davidben-tls13-pkcs1/00/},
    author =    {David Benjamin},
    title =     {{Legacy RSASSA-PKCS1-v1\_5 codepoints for TLS 1.3}},
    pagetotal = 5,
    year =      2019,
    month =     jul,
    day =       29,
    abstract =  {This document allocates code points for the use of RSASSA-PKCS1-v1\_5 with client certificates in TLS 1.3.},
}