@article{DE_2000_36_1_a15,
     author = {I. N. Sergeev},
     title = {An upper estimate for the minimal exponent of a three-dimensional system},
     journal = {Differencialʹnye uravneni\^a},
     pages = {114--123},
     publisher = {mathdoc},
     volume = {36},
     number = {1},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2000_36_1_a15/}
}