@article{DE_1993_29_5_a4,
     author = {V. V. Zaitsev},
     title = {A criterion for the existence of and estimates for invariant bounded sets of a system of autonomous differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {766--772},
     publisher = {mathdoc},
     volume = {29},
     number = {5},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1993_29_5_a4/}
}