TY  - JOUR
AU  - Yu. N. Valitskii
TI  - On the convergence of difference approximations of the eigenvalues and eigenfunctions of a two-dimensional elliptic operator
JO  - Doklady Akademii Nauk
PY  - 1971
SP  - 263
EP  - 265
VL  - 198
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1971_198_2_a0/
LA  - ru
ID  - DAN_1971_198_2_a0
ER  -