TY  - JOUR
AU  - V. S. Shulman
TI  - On algebras of operators in a space with indefinite metric of type $\Pi_1$
JO  - Doklady Akademii Nauk
PY  - 1971
SP  - 44
EP  - 47
VL  - 201
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1971_201_1_a10/
LA  - ru
ID  - DAN_1971_201_1_a10
ER  -