TY  - JOUR
AU  - V. O. Mishchenko
TI  - Expansion in eigenfunctions of a symmetric abstract elliptic differential operator
JO  - Differencialʹnye uravneniâ
PY  - 1980
SP  - 1474
EP  - 1483
VL  - 16
IS  - 8
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1980_16_8_a13/
LA  - ru
ID  - DE_1980_16_8_a13
ER  -