@article{DE_1968_4_1_a14,
     author = {V. D. Kopchenov},
     title = {The approximation of the solution of the {Dirichlet} problem by the method of fictitious domains},
     journal = {Differencialʹnye uravneni\^a},
     pages = {151--164},
     publisher = {mathdoc},
     volume = {4},
     number = {1},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1968_4_1_a14/}
}