@article{Denecke1991,
  author    = {Denecke, Klaus-Dieter},
  title     = {Congruences on maximal partial clones and strong regular varieties generated by preprimal partial algebras II},
  year      = {1991},
  language  = {en}
}
@article{Denecke1991,
  author    = {Denecke, Klaus-Dieter},
  title     = {Strong regular varieties of partial algebras I},
  year      = {1991},
  language  = {en}
}
@article{Denecke1991,
  author    = {Denecke, Klaus-Dieter},
  title     = {Minimal algebras and category equivalences},
  year      = {1991},
  language  = {en}
}
@article{CromeFranzkeMontagetal.1991,
  author    = {Crome, Erhard and Franzke, Jochen and Montag, Claus and Schrader, Lutz},
  title     = {New challenges for european security policy in the 90s},
  year      = {1991},
  language  = {en}
}
@article{NeumannKasperKasper1991,
  author    = {Neumann, Werner and Kasper, Sabine and Kasper, Roberto},
  title     = {Discharge Currents in Polymer Solids between Blocking Contacts},
  isbn      = {0-7803-0113- 7},
  year      = {1991},
  language  = {en}
}
@book{OPUS4-29390,
  title     = {Chemical Physics},
  editor    = {Z{\"u}licke, Lutz},
  publisher = {Elsevier},
  address   = {Amsterdam [u.a.]},
  year      = {1991},
  language  = {en}
}
@book{OPUS4-29338,
  title     = {The Journal of Jewish Thought \& Philosophy},
  editor    = {Gr{\"o}zinger, Karl Erich},
  address   = {New York},
  year      = {1991},
  language  = {en}
}
@article{DittmannKohliLachmannKliegletal.1991,
  author    = {Dittmann-Kohli, Freya and Lachmann, Margic and Kliegl, Reinhold and Baltes, Paul B.},
  title     = {Effects of cognitive training and testing on intellectual efficacy beliefs in elderly adults},
  year      = {1991},
  language  = {en}
}
@article{ThompsonKliegl1991,
  author    = {Thompson, Laura A. and Kliegl, Reinhold},
  title     = {Adult age effects of plausibility on memory : the role of time constraints during encoding},
  year      = {1991},
  language  = {en}
}
@book{OPUS4-29794,
  title     = {West European politics Series},
  editor    = {Goetz, Klaus Hermann},
  publisher = {Taylor and Francis},
  address   = {Abingdon},
  year      = {1991},
  language  = {en}
}