%% You should probably cite draft-ietf-tcpinc-use-tls instead of this I-D.
@techreport{rescorla-tcpinc-tls-option-02,
    number =    {draft-rescorla-tcpinc-tls-option-02},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-rescorla-tcpinc-tls-option/02/},
    author =    {Eric Rescorla},
    title =     {{TCP Use TLS Option}},
    pagetotal = 8,
    year =      2015,
    month =     may,
    day =       11,
    abstract =  {This document defines a TCP option (TCP-TLS) to indicate that TLS should be negotiated on a given TCP connection.},
}