@article{HagemannHeroGonser2006,
  author    = {Hans-J{\"u}rgen Hagemann and A. Hero and U. Gonser},
  title     = {The valence change of Fe in BaTiO3 studied by M{\"o}ßbauer effect and gravimetry. Hagemann, H. J.; Hero, A.; Gonser, U.},
  journal   = {Physica Status Solidi (A) - Applied Research. 61 (1980)},
  pages     = {63 -- 72},
  year      = {2006},
}