@article{IM2_2001_65_2_a2,
     author = {A. A. Kon'kov},
     title = {On solutions of non-autonomous ordinary differential equations},
     journal = {Izvestiya. Mathematics},
     pages = {285--327},
     year = {2001},
     volume = {65},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2001_65_2_a2/}
}