1. Theory of Impulsive Differential Equations;Lakshmikantham,1989
2. Systems with Impulse Effect;Bainov,1989
3. Impulsive Differential Equations;Samoilenko,1995
4. Nonlinear Integral Equations in Abstract Spaces;Guo,1996
5. Sobre los problemas de condiciones a la frontiera en una dimension de caracteristicas discontinuas;Moshinsky;Bol. Soc. Mat. Mexicana,1950