TY  - JOUR
AU  - M. O. Otelbaev
TI  - Estimates of $s$-numbers and completeness conditions for systems of root vectors of non-self-adjoint Sturm–Liouville operators
JO  - Matematičeskie zametki
PY  - 1979
SP  - 409
EP  - 418
VL  - 25
IS  - 3
UR  - http://geodesic.mathdoc.fr/item/MZM_1979_25_3_a8/
LA  - ru
ID  - MZM_1979_25_3_a8
ER  -