@article{DE_1972_8_4_a14,
     author = {\`E. M. Saak},
     title = {The stability of the {Dirichlet} problem for elliptic equations of arbitrary order},
     journal = {Differencialʹnye uravneni\^a},
     pages = {706--714},
     publisher = {mathdoc},
     volume = {8},
     number = {4},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1972_8_4_a14/}
}