title: Comparison between the electronic dielectric functions of a GaAs/AlAs superlattice and its bulk components by spectroscopic ellipsometry using core levels.
authors.initials: O
authors.lastname: Günther
authors.initials: C
authors.lastname: Janowitz
authors.initials: G
authors.lastname: Jungk
authors.initials: B
authors.lastname: Jenichen
authors.initials: R
authors.lastname: Hey
authors.initials: L
authors.lastname: Däweritz
authors.initials: K
authors.lastname: Ploog