no. 2
Estimates of the solutions of impulsive quasilinear functional differential equations
Annales de la Faculté des sciences de Toulouse : Mathématiques, Série 5, Tome 12 (1991) no. 2, pp. 149-161. 
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     title = {Estimates of the solutions of impulsive quasilinear functional differential equations},
     journal = {Annales de la Facult\'e des sciences de Toulouse : Math\'ematiques},
     pages = {149--161},
     publisher = {Universit\'e Paul Sabatier},
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     volume = {Ser. 5, 12},
     number = {2},
     year = {1991},
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     zbl = {0749.34039},
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     url = {http://archive.numdam.org/item/AFST_1991_5_12_2_149_0/}
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Bainov, Drumi; Covachev, Valéry; Stamova, Ivanka. Estimates of the solutions of impulsive quasilinear functional differential equations. Annales de la Faculté des sciences de Toulouse : Mathématiques, Série 5, Tome 12 (1991) no. 2, pp. 149-161. http://archive.numdam.org/item/AFST_1991_5_12_2_149_0/

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[2] Lakshmikantham (V.), Bainov (D.D.) and Simeonov (P.S.) .- Theory of Impulsive Differential Equations, World Publishers, Singapore, 1989. | MR | Zbl

[3] Bainov (D.D.) and Simeonov (P.S.) .- Systems with Impulse Effect : Theory and Applications, Ellis Horwood, 1989. | MR | Zbl