BibTeX Reference for “CSS Writing Modes Level 3”

@TechReport{Etemad:19:CWM,
  author      = "Elika Etemad and Koji Ishii",
  title       = "{CSS} Writing Modes Level 3",
  month       = dec,
  note        = "https://www.w3.org/TR/2019/REC-css-writing-modes-3-20191210/",
  year        = "2019",
  bibsource   = "https://w2.syronex.com/jmr/w3c-biblio",
  type        = "{W3C} Recommendation",
  institution = "W3C",
}