%0 Journal Article %A Ladislav Sehnal %T The Earth Upper Atmosphere and the Motion of the Artificial Satellites %J Publications of the Department of Astronomy %D 1980 %P 5 - 13 %V 10 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/PDA_1980_10_1_a0/ %F PDA_1980_10_1_a0