@article{DE_1982_18_7_a1,
     author = {V. B. Andreev and E. Yu. Arkhipova},
     title = {On an investigation of the accuracy of difference schemes for elliptic equations with discontinuous coefficients},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1117--1126},
     publisher = {mathdoc},
     volume = {18},
     number = {7},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1982_18_7_a1/}
}