TY  - JOUR
AU  - V. V. Nikulin
TI  - Local invariants of 4-dimensional pseudo-Riemannian manifolds with a~Lorentz metric
JO  - Itogi Nauki i Tekhniki. Seriya Problemy Geometrii. Trudy Geometricheskogo Seminara
PY  - 1985
SP  - 87
EP  - 130
VL  - 17
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/INTG_1985_17_a2/
LA  - ru
ID  - INTG_1985_17_a2
ER  -