Reference for “Multimodal Interaction Requirements”

@TechReport{Saraswat:03:MIR,
  author      = "Vijay Saraswat and St\'{e}phane H. Maes",
  title       = "Multimodal Interaction Requirements",
  month       = jan,
  note        = "http://www.w3.org/TR/2003/NOTE-mmi-reqs-20030108/",
  year        = "2003",
  bibsource   = "http://w2.syronex.com/jmr/w3c-biblio",
  type        = "{W3C} Note",
  institution = "W3C",
}