TY  - JOUR
AU  - Zoltán Sasvári
TI  - New Proof of Naimark's Theorem on the Existence of Nonpositive Invariant Subspaces for Commuting Families of Unitary Operators in Pontryagin Spaces.
JO  - Monatshefte für Mathematik
PY  - 1990
SP  - 153
EP  - 156
VL  - 109
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MOMA_1990__109_2_178466/
ID  - MOMA_1990__109_2_178466
ER  -