@article{IVM_1993_4_a2,
     author = {A. Kh. Gelig and Yu. V. Elkhimova},
     title = {The averaging method in the dynamics of nonlinear impulse systems},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {58--61},
     publisher = {mathdoc},
     number = {4},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1993_4_a2/}
}