TY  - JOUR
AU  - V. M. Bruk
TI  - On Invertible Contractions of Quotients Generated by a Differential Expression and by a Nonnegative Operator Function
JO  - Matematičeskie zametki
PY  - 2007
SP  - 652
EP  - 664
VL  - 82
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_2007_82_5_a1/
LA  - ru
ID  - MZM_2007_82_5_a1
ER  -