@article{DE_1981_17_3_a15,
     author = {V. N. Shchennikov},
     title = {Estimate of error of linearization of a nonlinear differential system in the critical case},
     journal = {Differencialʹnye uravneni\^a},
     pages = {568--571},
     publisher = {mathdoc},
     volume = {17},
     number = {3},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1981_17_3_a15/}
}