@article{11812,
      author       = "Bernard, A. and Touboul, P. and Office Nat. d'Etudes et de
                      Resh. Aérosph. Chatillon Cedex and 19. IUGG - Vancouver,
                      Aug. 9-22, 1987",
      title        = "GRADIO: An elektrostatic spaceborne gravity gradiometer  ",
      year         = "1987",
      note         = "Liter. - Příl. - 7 obr., 1 sv.",
}