@misc{rfc5861,
    series =    {Request for Comments},
    number =    5861,
    howpublished =  {RFC 5861},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC5861},
    url =       {https://www.rfc-editor.org/info/rfc5861},
    author =    {Mark Nottingham},
    title =     {{HTTP Cache-Control Extensions for Stale Content}},
    pagetotal = 6,
    year =      2010,
    month =     may,
    abstract =  {This document defines two independent HTTP Cache-Control extensions that allow control over the use of stale responses by caches. This document is not an Internet Standards Track specification; it is published for informational purposes.},
}