@article{VTAMU_2018_23_123_a20,
     author = {A. I. Perov and V. K. Kaverina},
     title = {Research of the nonautonomous system of {ODE} by the ideas of the method of guiding functions},
     journal = {Vestnik rossijskih universitetov. Matematika},
     pages = {510--516},
     publisher = {mathdoc},
     volume = {23},
     number = {123},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VTAMU_2018_23_123_a20/}
}