@Conference{WaGfKlS12,
  author = {Wagner, Ralf},
  title  = {The Dark Side of Marketing Communication: Grouping Consumers with Respect to Their Reactance Behavior},

  year   = {2012},
  number = {},
  url    = {http://147.172.223.251/gfkl2012/proceedingsGfKl2012GroupedByAreas.pdf#page=162},

  const  = {\ text}
}
@Conference{zulauf2012power,
  author = {Zulauf, Katrin and Wagner, Ralf},
  title  = {Power Shift Paradox in Retailer-Manufacturer Negotiations: How to Take Advantage of the Channel Power Shift?},

  year   = {2012},
  number = {},
  url    = {},

  const  = {\ text}
}