TY  - JOUR
AU  - V. I. Meleshko
TI  - Perturbations of unbounded closed pseudoinverse operators
JO  - Differencialʹnye uravneniâ
PY  - 1979
SP  - 681
EP  - 694
VL  - 15
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1979_15_4_a11/
LA  - ru
ID  - DE_1979_15_4_a11
ER  -