@article{KaemperPappasHopster2007,
  author    = {Klaus-Peter K{\"a}mper and D. P. Pappas and H. Hopster},
  title     = {Reversible transition between perpendicular and in-plane magnetization in ultrathin films. Pappas, D. P.; K{\"a}mper, K.-P.; Hopster, H.},
  journal   = {Physical Review Letters. 64 (1990), H. 26},
  pages     = {3179 -- 3182},
  year      = {2007},
}