BibTeX Reference for “CSS Snapshot 2021”

@TechReport{Jr.:21:CS,
  author      = "Tab Atkins Jr. and Elika Etemad and Florian Rivoal",
  title       = "{CSS} Snapshot {2021}",
  month       = dec,
  note        = "https://www.w3.org/TR/2021/NOTE-css-2021-20211231/",
  year        = "2021",
  bibsource   = "https://w2.syronex.com/jmr/w3c-biblio",
  type        = "{W3C} Note",
  institution = "W3C",
}