@article{DAN_1970_193_1_a3,
     author = {Yu. I. Domshlak},
     title = {On the oscillation of solutions of vector differential equations},
     journal = {Doklady Akademii Nauk},
     pages = {21--23},
     year = {1970},
     volume = {193},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1970_193_1_a3/}
}