TY  - JOUR
AU  - D. D. Sokolov
TI  - On some properties of an indefinite metric
JO  - Sbornik. Mathematics
PY  - 1971
SP  - 1
EP  - 6
VL  - 15
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_1971_15_1_a0/
LA  - en
ID  - SM_1971_15_1_a0
ER  -