@article{Biener1987,
  author    = {Biener, Ernst},
  title     = {{\"U}berblick {\"u}ber Reinigungsverfahren von kontaminierten B{\"o}den},
  series = {[Tagungsband] 21. Tiefbaukolloquium / Haus der Technik e.V.},
  journal   = {[Tagungsband] 21. Tiefbaukolloquium / Haus der Technik e.V.},
  publisher = {Eigenverl. Haus der Technik},
  address   = {Essen},
  pages     = {5.01 -- 5.13},
  year      = {1987},
  language  = {de}
}
@article{Biener1987,
  author    = {Biener, Ernst},
  title     = {Planung neuer Deponien},
  series = {[Tagungsband] 21. Tiefbaukolloquium / Haus der Technik e.V.},
  journal   = {[Tagungsband] 21. Tiefbaukolloquium / Haus der Technik e.V.},
  publisher = {Eigenverl. Haus der Technik},
  address   = {Essen},
  pages     = {9.01 -- 9.08},
  year      = {1987},
  language  = {de}
}
@article{SchaeferRessSpahnetal.1998,
  author    = {Sch{\"a}fer, Horst and Ress, H. R. and Spahn, W. and Ebel, R. (u.a.)},
  title     = {Start of misfit relaxation in GaAs-ZnSe heterostructures},
  series = {Journal of Crystal Growth. 184-185 (1998)},
  journal   = {Journal of Crystal Growth. 184-185 (1998)},
  isbn      = {0022-0248},
  pages     = {90 -- 94},
  year      = {1998},
  language  = {en}
}