@misc{BuchholzdeBieBach2014,
  author    = {Wolfgang Buchholz and Holger de Bie and Norbert Bach},
  title     = {Rationales and Industry Differences of Concurrent Sourcing in the German Agricultural and Chemical Industry. 23rd Annual International Purchasing and Supply Education and Research Association (IPSERA) Conference: "Purchasing and Supply Management in Difficult Times - The Sky is the Limit". Pretoria, S{\"u}dafrika. 13.-16. April 2014},
  institution = {Wirtschaft (MSB)},
  type      = {lecture},
  year        = {2014},
}