@article{DE_1981_17_7_a1,
     author = {M. V. Alexeevsky},
     title = {Difference schemes of a high order of accuracy for a singularly perturbed boundary value problem},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1171--1183},
     publisher = {mathdoc},
     volume = {17},
     number = {7},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1981_17_7_a1/}
}