Reference for “CSS Image Values Module Level 3”

@TechReport{Etemad:09:CIV,
  author      = "Elika J. Etemad",
  title       = "{CSS} Image Values Module Level 3",
  month       = jul,
  note        = "http://www.w3.org/TR/2009/WD-css3-images-20090723/",
  year        = "2009",
  bibsource   = "http://w2.syronex.com/jmr/w3c-biblio",
  type        = "{W3C} Working Draft",
  institution = "W3C",
}