%% You should probably cite rfc7671 instead of this I-D.
@techreport{ietf-dane-ops-16,
    number =    {draft-ietf-dane-ops-16},
    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-dane-ops/16/},
    author =    {Viktor Dukhovni and Wes Hardaker},
    title =     {{The DNS-Based Authentication of Named Entities (DANE) Protocol: Updates and Operational Guidance}},
    pagetotal = 33,
    year =      2015,
    month =     aug,
    day =       8,
    abstract =  {This document clarifies and updates the DNS-Based Authentication of Named Entities (DANE) TLSA specification (RFC 6698), based on subsequent implementation experience. It also contains guidance for implementers, operators, and protocol developers who want to use DANE records.},
}