@article{9291,
      author       = "Vermeer, Martin",
      title        = "FGI Studies on Satellite Gravity Gradiometry. 2.
                      Geopotential recovery at O.5 - degree resolution from global
                      satellite gradiometry data sets  ",
      year         = "1990",
      note         = "Obr. a tab. v textu. - Liter.",
}