TY  - JOUR
AU  - L. A. Kotko
TI  - The behavior of the eigenfunctions and eigenvalues of elliptic boundary value problems under variation of the domain
JO  - Differencialʹnye uravneniâ
PY  - 1973
SP  - 307
EP  - 319
VL  - 9
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1973_9_2_a12/
LA  - ru
ID  - DE_1973_9_2_a12
ER  -