@article{MZM_1993_53_2_a17,
     author = {V. V. Filippov},
     title = {The {Poincar\'e--Bendixson} theorem and compact families of solution spaces of ordinary differential equations},
     journal = {Matemati\v{c}eskie zametki},
     pages = {140--144},
     publisher = {mathdoc},
     volume = {53},
     number = {2},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1993_53_2_a17/}
}