@article{FoersterSchaepersMuelleretal.1993,
  author    = {F{\"o}rster, Arnold and Sch{\"a}pers, T. and M{\"u}ller, F. and Lengeler, B.},
  title     = {Reflection and transmission of ballistic electrons at a potential barrier / Sch{\"a}pers, T. ; M{\"u}ller, F. ; F{\"o}rster, A. ; Lengeler, B. ; L{\"u}th, H.},
  series = {Superlattices and microstructures . 14 (1993), H. 1},
  journal   = {Superlattices and microstructures . 14 (1993), H. 1},
  isbn      = {0749-6036},
  pages     = {57},
  year      = {1993},
  language  = {en}
}
@article{FoersterMuellerLengeleretal.1995,
  author    = {F{\"o}rster, Arnold and M{\"u}ller, F. and Lengeler, B. and Sch{\"a}pers, T.},
  title     = {Electron-electron interaction in ballistic electron beams / F. M{\"u}ller ; B. Lengeler ; Th. Sch{\"a}pers ... A. F{\"o}rster...},
  series = {Physical Review B . 51 (1995), H. 8},
  journal   = {Physical Review B . 51 (1995), H. 8},
  isbn      = {0163-1829},
  pages     = {5099 -- 5105},
  year      = {1995},
  language  = {en}
}
@article{FoersterSchaepersMueller1994,
  author    = {F{\"o}rster, Arnold and Sch{\"a}pers, T. and M{\"u}ller, F.},
  title     = {Control of ballistic electrons in (AlGa)As/GaAs heterostructures by means of superconducting niobium gate structures / T. Sch{\"a}pers ; F. M{\"u}ller ; A. F{\"o}rster ...},
  series = {Surface Science. 305 (1994), H. 1-3},
  journal   = {Surface Science. 305 (1994), H. 1-3},
  isbn      = {0039-6028},
  pages     = {460 -- 464},
  year      = {1994},
  language  = {en}
}