@article{BuchholzStepniak2008,
  author    = {Wolfgang Buchholz and Sherin Stepniak},
  title     = {Procurement Service Providing: Konzeption - Branchenstudie - Praxisbeispiel},
  journal   = {Supply Chain Management},
  number    = {2},
  pages     = {7 -- 14},
  year      = {2008},
}