%% You should probably cite rfc3253 instead of this I-D.
@techreport{ietf-deltav-versioning-20,
    number =    {draft-ietf-deltav-versioning-20},
    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-deltav-versioning/20/},
    author =    {Tim Ellison and Christopher Kaler and Jim Amsden and Jim Whitehead and Geoffrey M. Clemm},
    title =     {{Versioning Extensions to WebDAV (Web Distributed Authoring and Versioning)}},
    pagetotal = 118,
    year =      2001,
    month =     oct,
    day =       23,
    abstract =  {This document specifies a set of methods, headers, and resource types that define the WebDAV (Web Distributed Authoring and Versioning) versioning extensions to the HTTP/1.1 protocol. {[}STANDARDS-TRACK{]}},
}