@article{SoyezThraen1996,
  author    = {Soyez, Konrad and Thr{\"a}n, Daniela},
  title     = {The german federal research programme on waste management},
  year      = {1996},
  language  = {en}
}
@article{Thraen2000,
  author    = {Thr{\"a}n, Daniela},
  title     = {Nachhaltiges Stoffstrommanagement l{\"a}ndlich strukturschwacher Regionen},
  year      = {2000},
  language  = {de}
}