@Book{WaBeS104,
  author = {Wagner, Ralf and Beinke, K.-S.},
  title  = {Identifying Patterns of Consumer Response to Price Endings},

  year   = {2004},
  number = {},
  url    = {},

  const  = {\ text}
}
@Book{WaS103,
  author = {Wagner, Ralf},
  title  = {Are Odd Prices Meaningful Price Thresholds? An Investigation by Generalised Cross Validation},

  year   = {2003},
  number = {},
  url    = {},

  const  = {\ text}
}