The existence of solutions of generalized differential equations
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Tài liệu tham khảo
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E. A. Barbashin and Yu. I. Alimov, ?The theory of relay differential equations,? Izv. Vuzov, Matematika, No. 1, 3?13 (1962).
A. F. Filippov, ?Classical solutions of differential equations with manifold right sides,? Vestnik MGU, Matem, i Mekhan., No. 3, 16?26 (1967).