TY  - JOUR
AU  - V. A. Il'in
TI  - Relations that are exact with respect to order between $L_2$-norms of eigen- and associated functions of a second-order elliptic operator
JO  - Differencialʹnye uravneniâ
PY  - 1982
SP  - 30
EP  - 37
VL  - 18
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1982_18_1_a3/
LA  - ru
ID  - DE_1982_18_1_a3
ER  -