@article{RM_1970_25_6_a16,
     author = {V. A. Yakubovich},
     title = {Frequency conditions for certain topological types of behavior {\textquotedblleft}in the large{\textquotedblright} of solutions of nonlinear differential equation},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     year = {1970},
     volume = {25},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1970_25_6_a16/}
}