@article{MM_1989_1_8_a7,
     author = {L. K. Kuz'mina},
     title = {On simplified models in dynamics of some singularly perturbed systems},
     journal = {Matemati\v{c}eskoe modelirovanie},
     pages = {103--109},
     publisher = {mathdoc},
     volume = {1},
     number = {8},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MM_1989_1_8_a7/}
}