%% You should probably cite rfc7232 instead of this I-D.
@techreport{ietf-httpbis-p4-conditional-19,
    number =    {draft-ietf-httpbis-p4-conditional-19},
    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-httpbis-p4-conditional/19/},
    author =    {Roy T. Fielding and Yves Lafon and Julian Reschke},
    title =     {{HTTP/1.1, part 4: Conditional Requests}},
    pagetotal = 28,
    year =      2012,
    month =     mar,
    day =       12,
    abstract =  {The Hypertext Transfer Protocol (HTTP) is an application-level protocol for distributed, collaborative, hypertext information systems. HTTP has been in use by the World Wide Web global information initiative since 1990. This document is Part 4 of the seven-part specification that defines the protocol referred to as "HTTP/1.1" and, taken together, obsoletes RFC 2616. Part 4 defines request header fields for indicating conditional requests and the rules for constructing responses to those requests.},
}