@article{WahrenburgFriedrichHackethaletal.2005,
  author    = {Mark Wahrenburg and Lars Friedrich and Andreas Hackethal and Tom Gellrich},
  title     = {Vertical integration of human resource organizations},
  journal   = {EFL quarterly : an E-Finance Lab publication},
  volume    = {2005},
  number    = {3},
  pages     = {5 -- 7},
  year      = {2005},
}