@article{DE_1975_11_10_a3,
     author = {A. B. Vasil'eva},
     title = {The resemblance between conditionally stable singularly perturbed systems and singularly perturbed systems with a zero characteristic number},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1754--1764},
     publisher = {mathdoc},
     volume = {11},
     number = {10},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1975_11_10_a3/}
}