TY  - JOUR
AU  - B. M. Levitan
TI  - On the determination of the Sturm--Liouville operator from one and two spectra
JO  - Izvestiya. Mathematics 
PY  - 1978
SP  - 179
EP  - 193
VL  - 12
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM2_1978_12_1_a6/
LA  - en
ID  - IM2_1978_12_1_a6
ER  -