Reference for “Selecting Payment Mechanisms Over HTTP”

@TechReport{Eastlake:97:SPM,
  author      = "Donald Eastlake and Rohit Khare and Jim Miller",
  title       = "Selecting Payment Mechanisms Over {HTTP}",
  month       = jan,
  note        = "http://www.w3.org/TR/WD-jepi-uppflow-970106",
  year        = "1997",
  bibsource   = "http://w2.syronex.com/jmr/w3c-biblio",
  type        = "{W3C} Working Draft",
  institution = "W3C",
}