Andronov A.A.,  Leontovich E.A.,  Gordon I.I. i dr. Kachestvennaya teoriya dinamicheskikh sistem vtorogo poryadka. Teoriya bifurkatsiy dinamicheskikh sistem na ploskosti/Andronov A.A.,  Leontovich E.A.,  Gordon I.I. et al. Qualitative theory of dynamic systems of the second order. The theory of bifurcation of dynamic systems on a plane In Russian - landofmagazines.com

TransliterationAndronov A.A., Leontovich E.A., Gordon I.I. i dr. Kachestvennaya teoriya dinamicheskikh sistem vtorogo poryadka. Teoriya bifurkatsiy dinamicheskikh sistem na ploskosti

In EnglishAndronov A.A., Leontovich E.A., Gordon I.I. et al. Qualitative theory of dynamic systems of the second order. The theory of bifurcation of dynamic systems on a plane In Russian

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