@article{MZM_1985_37_1_a7,
     author = {V. E. Slyusarchuk},
     title = {Instability of differential equations with respect to the first approximation},
     journal = {Matemati\v{c}eskie zametki},
     pages = {72--77},
     publisher = {mathdoc},
     volume = {37},
     number = {1},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1985_37_1_a7/}
}