@article{TIMM_2003_9_2_a4,
     author = {K. V. Emel'yanov},
     title = {On an approximate solution of a~one-dimensional linear singularly perturbed problem},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {55--63},
     year = {2003},
     volume = {9},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2003_9_2_a4/}
}