@article{DE_1976_12_12_a24,
     author = {A. N. Yarkin},
     title = {Occurrence of an internal boundary layer in singularly perturbed systems of conditionally stable type},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2285--2286},
     publisher = {mathdoc},
     volume = {12},
     number = {12},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1976_12_12_a24/}
}