BAINOV, D. D., KOSTADINOV, S. I., MINH, N. V., & ZABREIKO, P. P. (1994). A TOPOLOGICAL CLASSIFICATION OF DIFFERENTIAL EQUATIONS WITH IMPULSE EFFECT. Tamkang Journal of Mathematics, 25(1), 15–27. https://doi.org/10.5556/j.tkjm.25.1994.4420