@article{SchaeferBoettcher2006,
  author    = {Horst Sch{\"a}fer and A. B{\"o}ttcher},
  title     = {Mapping of magnetic domain structures inside of ferromagnetic materials by X-ray topography},
  journal   = {Physica Status Solidi (A). 113 (1989)},
  pages     = {551},
  year      = {2006},
}