@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}
}
@book{HooftHolsteinMakrietal.2001,
  author    = {Hooft, Gerard and Holstein, Barry and Makri, Nancy and Duru, Ismail and Ruffini, Remo and Janke, Wolfhard and Pelster, Axel and Schmidt, Hans-J{\"u}rgen and Bachmann, Michael},
  title     = {Fluctuating paths and fields : festschrift dedicated to Hagen Kleinert on the occasion of his 60the birthday},
  publisher = {World Scientific},
  address   = {River Edge, NJ},
  isbn      = {981-02-4648-X},
  pages     = {871 S.},
  year      = {2001},
  language  = {en}
}