Svistun O. P.
Ukr. Mat. Zh. - 1994. - 46, № 5. - pp. 580–585
Sufficient conditions of existence of piecewise continuous separatrix curves are obtained for a certain class of systems of differential equations with pulse influence for small $\varepsilon \geq 0$.
Ukr. Mat. Zh. - 1993. - 45, № 12. - pp. 1682–1687
For a family of linear systems of differential equations with pulse influence, we establish conditions of existence of separatrix curves and present a method for finding these curves.