TY  - JOUR
AU  - B. M. Levitan
TI  - On the expansion according to the eigenfunctions of a self-adjoint partial differential equation
JO  - Trudy Moskovskogo matematičeskogo obŝestva
PY  - 1956
SP  - 269
EP  - 298
VL  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MMO_1956_5_a4/
LA  - ru
ID  - MMO_1956_5_a4
ER  -