@article{DE_1985_21_10_a3,
     author = {Yu. A. Mitropol'skii and V. L. Kulik and A. I. Skrypnyk},
     title = {Investigation of invariant toroidal manifolds of dynamical systems, and questions of automation of methods for investigating differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1679--1692},
     publisher = {mathdoc},
     volume = {21},
     number = {10},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1985_21_10_a3/}
}