@article{34760,
      author       = "Matikainen, L. and Xiaowei, Yu and Kuittinen, R.",
      title        = "Updating topographic maps by using multisource data and
                      knewledge - based interpretation  ",
      year         = "1997",
      note         = "Obr. a tab. v textu., Lit., 1 sv.",
}