@article{DE_1989_25_11_a11,
     author = {N. N. Petrov and I. S. Han},
     title = {Limit sets for trajectories of dynamical polysystems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1910--1915},
     publisher = {mathdoc},
     volume = {25},
     number = {11},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1989_25_11_a11/}
}