@article{Baumgaertel1993,
  author    = {Baumg{\"a}rtel, Hellmut},
  title     = {Laudatio Hans Kaiser},
  year      = {1993},
  language  = {de}
}
@book{Baumgaertel1993,
  author    = {Baumg{\"a}rtel, Hellmut},
  title     = {Operatoralgebren und Quantenfeldtheorie},
  series = {Preprint / Universit{\"a}t Potsdam, Fachbereich Mathematik},
  volume    = {1993, 12},
  journal   = {Preprint / Universit{\"a}t Potsdam, Fachbereich Mathematik},
  publisher = {Univ.},
  address   = {Potsdam},
  pages     = {11 Bl.},
  year      = {1993},
  language  = {de}
}
@book{BaumgaertelJurkeLledo1994,
  author    = {Baumg{\"a}rtel, Hellmut and Jurke, Matthias and Lled{\´o}, Fernando},
  title     = {Mathematische Strukturen passen auf die Natur : Reflexionen {\"u}ber das Wechselverh{\"a}ltnis von Mathematik und Physik},
  series = {Preprint / Universit{\"a}t Potsdam, Institut f{\"u}r Mathematik},
  volume    = {1994, 18},
  journal   = {Preprint / Universit{\"a}t Potsdam, Institut f{\"u}r Mathematik},
  publisher = {Univ.},
  address   = {Potsdam},
  year      = {1994},
  language  = {de}
}
@book{BaumgaertelJurkeLledo1995,
  author    = {Baumg{\"a}rtel, Hellmut and Jurke, Matthias and Lled{\´o}, Fernando},
  title     = {Symmetrie und Quantentheorie},
  series = {Preprint / Universit{\"a}t Potsdam, Institut f{\"u}r Mathematik},
  volume    = {1995, 6},
  journal   = {Preprint / Universit{\"a}t Potsdam, Institut f{\"u}r Mathematik},
  publisher = {Univ.},
  address   = {Potsdam},
  year      = {1995},
  language  = {de}
}
@book{Baumgaertel1997,
  author    = {Baumg{\"a}rtel, Hellmut},
  title     = {Betrachtungen zur kulturellen Dimension der Mathematik},
  series = {Preprint / Universit{\"a}t Potsdam, Institut f{\"u}r Mathematik},
  volume    = {1997, 15},
  journal   = {Preprint / Universit{\"a}t Potsdam, Institut f{\"u}r Mathematik},
  publisher = {Univ.},
  address   = {Potsdam},
  pages     = {17 S.},
  year      = {1997},
  language  = {de}
}
@book{Baumgaertel1997,
  author    = {Baumg{\"a}rtel, Hellmut},
  title     = {{\"U}ber Superauswahlstrukturen und deren Eichgruppen},
  series = {Preprint / Universit{\"a}t Potsdam, Institut f{\"u}r Mathematik},
  volume    = {1997, 06},
  journal   = {Preprint / Universit{\"a}t Potsdam, Institut f{\"u}r Mathematik},
  publisher = {Univ.},
  address   = {Potsdam},
  pages     = {13 Bl.},
  year      = {1997},
  language  = {de}
}
@article{Baumgaertel1998,
  author    = {Baumg{\"a}rtel, Hellmut},
  title     = {Erhard Schmidt, John von Neumann},
  isbn      = {3-7643-5943- 9},
  year      = {1998},
  language  = {de}
}