@article{AFST_1991_5_12_3_391_0,
     author = {Milusheva, Svetla Dimitrova and Bainov, Drumi Dimitrov},
     title = {Averaging method for neutral type impulsive differential equations with supremums},
     journal = {Annales de la Facult\'e des sciences de Toulouse : Math\'ematiques},
     pages = {391--403},
     publisher = {Universit\'e Paul Sabatier},
     address = {Toulouse},
     volume = {Ser. 5, 12},
     number = {3},
     year = {1991},
     mrnumber = {1189448},
     zbl = {0760.34039},
     language = {en},
     url = {http://www.numdam.org/item/AFST_1991_5_12_3_391_0/}
}