TY  - JOUR
AU  - D. M. Polyakov
TI  - Spectral estimates for fourth-order differential operator with periodic coefficients
JO  - Izvestiâ vysših učebnyh zavedenij. Matematika
PY  - 2022
SP  - 86
EP  - 92
IS  - 7
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IVM_2022_7_a8/
LA  - ru
ID  - IVM_2022_7_a8
ER  -