Ordinary dichotomy and perturbations of the coefficient matrix of the linear impulsive differential equation Nedelcho Velev Milev; Drumi Dimitrov Bainov — 1991 Annales de la Faculté des sciences de Toulouse : Mathématiques
Averaging method for neutral type impulsive differential equations with supremums Svetla Dimitrova Milusheva; Drumi Dimitrov Bainov — 1991 Annales de la Faculté des sciences de Toulouse : Mathématiques
Asymptotic stability for a homogeneous singularly perturbed system of differential equations with unbounded delay Hristo Dimitrov Voulov; Drumi Dimitrov Bainov — 1993 Annales de la Faculté des sciences de Toulouse : Mathématiques