On the Number of Databases and Closure Operations

@article{Burosch1991OnTN,
  title={On the Number of Databases and Closure Operations},
  author={Gustav Burosch and J{\'a}nos Demetrovics and Gyula O. H. Katona and Daniel J. Kleitman and Alexander A. Sapozhenko},
  journal={Theor. Comput. Sci.},
  year={1991},
  volume={78},
  pages={377-381}
}
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