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@article{DE_1974_10_3_a24, author = {\`E. S. Shpigelman}, title = {The radius of attraction of a certain two-dimensional system}, journal = {Differencialʹnye uravneni\^a}, pages = {563--566}, publisher = {mathdoc}, volume = {10}, number = {3}, year = {1974}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1974_10_3_a24/} }
È. S. Shpigelman. The radius of attraction of a certain two-dimensional system. Differencialʹnye uravneniâ, Tome 10 (1974) no. 3, pp. 563-566. http://geodesic.mathdoc.fr/item/DE_1974_10_3_a24/