@inproceedings{BUT19089,
  author="Jan {Chvalina}",
  title="Realizations of closure spaces by set systems",
  booktitle="General Topology and its Relations to Modern Analysis and Algebra III. Proceedings of the 3rd Prague Topological Symposium",
  year="1972",
  number="1",
  pages="87",
  publisher="Karlova univerzita",
  address="Praha"
}