@article{01214057, title = {Second method of Lyapunov for stability of linear impulsive differential-difference equations with variable impulsive perturbations.}, journal = {Journal of Applied Mathematics and Stochastic Analysis}, volume = {11}, year = {1998}, pages = {209-216}, doi = {10.1155/S104895339800015X}, zbl = {0943.34062}, language = {en}, url = {http://dml.mathdoc.fr/item/01214057} }
Bainov, D.D.; Stamova, I.M.; Vatsala, A.S. Second method of Lyapunov for stability of linear impulsive differential-difference equations with variable impulsive perturbations.. Journal of Applied Mathematics and Stochastic Analysis, Tome 11 (1998) pp. 209-216. doi : 10.1155/S104895339800015X. http://gdmltest.u-ga.fr/item/01214057/