@incollection{TimpeBlatSchwabedissen1986,
  author    = {Timpe, Petra and Blat, R. and Schwabedissen, E.},
  title     = {Vocabulaire allemand},
  publisher = {Bordas},
  address   = {Paris},
  year      = {1986},
  language  = {mul}
}
@incollection{TimpeBlatSchwabedissen1988,
  author    = {Timpe, Petra and Blat, R. and Schwabedissen, E.},
  title     = {Exercices et corrig{\´e}s de Vocabulaire allemand},
  publisher = {Bordas},
  address   = {Paris},
  year      = {1988},
  language  = {mul}
}