BibTeX Reference for “The srcset attribute”

@TechReport{O'Connor:14:T,
  author      = "Theresa O'Connor",
  title       = "The srcset attribute",
  month       = aug,
  note        = "https://www.w3.org/TR/2014/NOTE-html-srcset-20140819/",
  year        = "2014",
  bibsource   = "https://w2.syronex.com/jmr/w3c-biblio",
  type        = "{W3C} Note",
  institution = "W3C",
}