@article{DE_1975_11_7_a1,
     author = {A. B. Vasil'eva and V. A. Esipova},
     title = {The extension of the class of conditionally stable singularly perturbed systems that admit application of the method of boundary functions},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1159--1174},
     publisher = {mathdoc},
     volume = {11},
     number = {7},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1975_11_7_a1/}
}