Reference for “PICS Signed Labels (DSig) 1.0 Specification”

@TechReport{DesAutels:09:PSL,
  author      = "Philip DesAutels and Yang-Hua Chu and Peter Lipp and Brian LaMacchia",
  title       = "{PICS} Signed Labels ({DSig}) 1.0 Specification",
  month       = nov,
  note        = "http://www.w3.org/TR/2009/REC-DSig-label-20091124",
  year        = "2009",
  bibsource   = "http://w2.syronex.com/jmr/w3c-biblio",
  type        = "{W3C} Recommendation",
  institution = "W3C",
}