@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{FoersterSchaepersKruegeretal.1995,
  author    = {F{\"o}rster, Arnold and Sch{\"a}pers, T. and Kr{\"u}ger, M. and Appenzeller, J.},
  title     = {Effect of electron-electron interaction on hot ballistic electron beams / Th. Sch{\"a}pers ; M. Kr{\"u}ger ; J. Appenzeller ; A. F{\"o}rster ...},
  series = {Applied physics letters. 66 (1995), H. 26},
  journal   = {Applied physics letters. 66 (1995), H. 26},
  isbn      = {0003-6951},
  pages     = {3603 -- 3606},
  year      = {1995},
  language  = {en}
}