@article{BachmannSchmidt2000,
  author    = {Bachmann, Michael and Schmidt, Hans-J{\"u}rgen},
  title     = {Period-doubling bifurcation in strongly anisotropic Bianchi I quantum cosmology},
  year      = {2000},
  language  = {en}
}
@article{BachmannSchmidt1999,
  author    = {Bachmann, Michael and Schmidt, Hans-J{\"u}rgen},
  title     = {Period-doubling bifurcation in strongly anisotropic Bianchi I quantum cosmology},
  series = {General relativity and quantum cosmology : preprints gr-qc},
  volume    = {9912068},
  journal   = {General relativity and quantum cosmology : preprints gr-qc},
  year      = {1999},
  language  = {en}
}