BibTeX Reference for “SPARQL 1.1 Service Description”

@TechReport{Williams:13:SSD,
  author      = "Gregory Williams",
  title       = "{SPARQL} 1.1 Service Description",
  month       = mar,
  note        = "https://www.w3.org/TR/2013/REC-sparql11-service-description-20130321/",
  year        = "2013",
  bibsource   = "https://w2.syronex.com/jmr/w3c-biblio",
  type        = "{W3C} Recommendation",
  institution = "W3C",
}