%% You should probably cite draft-ietf-tokbind-tls13-03 instead of this revision.
@techreport{ietf-tokbind-tls13-01,
    number =    {draft-ietf-tokbind-tls13-01},
    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-tokbind-tls13/01/},
    author =    {Nick Harper},
    title =     {{Token Binding for Transport Layer Security (TLS) Version 1.3 Connections}},
    pagetotal = 5,
    year =      2018,
    month =     may,
    day =       21,
    abstract =  {Negotiation of the Token Binding protocol is only defined for Transport Layer Security (TLS) versions 1.2 and earlier. Token Binding users may wish to use it with TLS 1.3; this document defines a backwards compatible way to negotiate Token Binding on TLS 1.3 connections.},
}