Reference for “Flexible Box Layout Module”

@TechReport{Baron:09:FBL,
  author      = "L. David Baron",
  title       = "Flexible Box Layout Module",
  month       = jul,
  note        = "http://www.w3.org/TR/2009/WD-css3-flexbox-20090723/",
  year        = "2009",
  bibsource   = "http://w2.syronex.com/jmr/w3c-biblio",
  type        = "{W3C} Working Draft",
  institution = "W3C",
}