@misc{BuchholzKirschTeitscheid2012,
  author    = {Buchholz, Wolfgang and Kirsch, Therese and Teitscheid, Petra},
  title     = {Sustainable raw material procurement as an answer to the risk of supply in food industry, Leuphana Sustainability Summit, L{\"u}neburg 2012},
  year      = {2012},
  language  = {en}
}
@incollection{Kirsch2013,
  author    = {Kirsch, Therese},
  title     = {Reasonable selection of sustainable sourcing measures in the food sector},
  series = {Holger Rogall et al. (Hrsg.): Jahrbuch Nachhaltige {\"O}konomie 2013 - 2014},
  booktitle = {Holger Rogall et al. (Hrsg.): Jahrbuch Nachhaltige {\"O}konomie 2013 - 2014},
  publisher = {Metropolis},
  address   = {Marburg},
  isbn      = {978-3-7316-1043-4},
  pages     = {443 -- 460},
  year      = {2013},
  language  = {en}
}