@article{FORUM_1989__1_3_141620,
     author = {Maria A. Hekimova and Drumi D. Bainov},
     title = {Almost {Periodic} {Solutions} of {Singularly} {Perturbed} {Systems} of {Differential} {Equations} with {Impulse} {Effect.}},
     journal = {Forum mathematicum},
     pages = {323--330},
     publisher = {mathdoc},
     volume = {1},
     number = {3},
     year = {1989},
     zbl = {0694.34033},
     url = {http://geodesic.mathdoc.fr/item/FORUM_1989__1_3_141620/}
}