@article{DE_1972_8_4_a5,
     author = {A. A. Shishkin},
     title = {Asymptotic behavior of solutions of boundary value problems for systems of linear ordinary differential equations with a small parameter multiplying the derivative},
     journal = {Differencialʹnye uravneni\^a},
     pages = {615--632},
     publisher = {mathdoc},
     volume = {8},
     number = {4},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1972_8_4_a5/}
}