Reference for “Behavioral Extensions to CSS”

@TechReport{Hickson:07:BEC,
  author      = "Ian Hickson",
  title       = "Behavioral Extensions to {CSS}",
  month       = oct,
  note        = "http://www.w3.org/TR/2007/WD-becss-20071019",
  year        = "2007",
  bibsource   = "http://w2.syronex.com/jmr/w3c-biblio",
  type        = "{W3C} Working Draft",
  institution = "W3C",
}