@article{33522,
      author       = "Stegena, L. and International Cartographic Association and
                      Working Session and Business Meeting, 21-26 Aug. 1973,
                      Budapest",
      title        = "Tools for Automation of Map Generalization: the Filter
                      Theory and the Coding Theory  ",
      year         = "1973",
      note         = "1 seš.",
}