TY  - JOUR
AU  - B. L. Livshits
TI  - Perturbation theory for a simple structure operator
JO  - Doklady Akademii Nauk
PY  - 1960
SP  - 800
EP  - 803
VL  - 133
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1960_133_4_a16/
LA  - ru
ID  - DAN_1960_133_4_a16
ER  -