@article{12546,
      author       = "Bouillé, F. and 9. mezinárodní konf. kart., Rockville,
                      Md. 1978",
      title        = "Hypergraphs and Cartographic Data Structures: The HBDS
                      System  ",
      year         = "1978",
      note         = "separáty, 1 seš.",
}