@article{MM_1991_3_4_a12,
     author = {A. B. Vasil'eva},
     title = {Contribution to the stability problem for the contrast structures},
     journal = {Matemati\v{c}eskoe modelirovanie},
     pages = {114--123},
     publisher = {mathdoc},
     volume = {3},
     number = {4},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MM_1991_3_4_a12/}
}