BibTeX Reference for “XML Schema: Formal Description”

@TechReport{Wadler:01:XSF,
  author      = "Philip Wadler and Matthew Fuchs and Allen Brown and Jonathan Robie",
  title       = "{XML} Schema: Formal Description",
  month       = sep,
  note        = "https://www.w3.org/TR/2001/WD-xmlschema-formal-20010925/",
  year        = "2001",
  bibsource   = "https://w2.syronex.com/jmr/w3c-biblio",
  type        = "{W3C} Working Draft",
  institution = "W3C",
}