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References
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| 1. |
Andreev A.A., Leontovich E.A., Gordon I.I., Maier A.G., Kachestvennaya teoriya dinamicheskikh sistem, Nauka, M., 1966 |
| 2. |
Sternberg S., Lektsii po differentsialnoi geometrii, Mir, M., 1970 |
| 3. |
Arnold V.I., Obyknovennye differentsialnye uravneniya, Nauka, M., 1971 |
| 4. |
Arnold V.I., UMN, XXVII:5 (1972), 119–184 |
| 5. |
Takens F., Publ. Math. Paris, 43 (1974), 47–100 |