@article{RM_1970_25_2_a9,
     author = {V. I. Arnol'd},
     title = {Algebraic unsolvability of the problem of stability and the problem of the topological classification of the singular points of analytic systems of differential equations},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     year = {1970},
     volume = {25},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1970_25_2_a9/}
}