@article{PDA_1980_10_1_a0,
     author = {Ladislav Sehnal},
     title = {The {Earth} {Upper} {Atmosphere} and the {Motion} of the {Artificial} {Satellites}},
     journal = {Publications of the Department of Astronomy},
     pages = {5 - 13},
     publisher = {mathdoc},
     volume = {10},
     number = {1},
     year = {1980},
     url = {http://geodesic.mathdoc.fr/item/PDA_1980_10_1_a0/}
}