@article{SchmittSkieraBulte2014,
  author    = {Philipp Schmitt and Bernd Skiera and Christophe Van den Bulte},
  title     = {Do referral programs increase profits?},
  journal   = {GfK Marketing Intelligence Review},
  volume    = {5},
  pages     = {8 -- 11},
  doi       = {10.2478/gfkmir-2014-0020},
  year      = {2014},
}