TY  - JOUR
AU  - I. S. Kats
TI  - On the spectral multiplicity of a second-order differential operator
JO  - Doklady Akademii Nauk
PY  - 1962
SP  - 510
EP  - 513
VL  - 145
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1962_145_3_a8/
LA  - ru
ID  - DAN_1962_145_3_a8
ER  -