@conference{WaGfKlS12,
  author = {Wagner, Ralf},
  title = {The Dark Side of Marketing Communication: Grouping Consumers with Respect to Their Reactance Behavior},
  year = {2012},
  url = {http://147.172.223.251/gfkl2012/proceedingsGfKl2012GroupedByAreas.pdf#page=162}
}

@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?},
  booktitle = {Proceedings of the 41st EMAC Conference, Marketing to Citizens: Going beyond Customers and Consumers},
  year = {2012}
}