@article{VMUMM_2004_3_a15,
     author = {O. A. Filippova},
     title = {Existence of a zone of ``non-gravity'' motion of a satellite on a slowly evolving orbit},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {65--67},
     publisher = {mathdoc},
     number = {3},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2004_3_a15/}
}