TY  - JOUR
AU  - A. N. Tyurin
TI  - Local and global invariants of a~four-dimensional pseudo-Riemannian manifold
JO  - Informatics and Automation
PY  - 1984
SP  - 205
EP  - 219
VL  - 165
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TRSPY_1984_165_a15/
LA  - ru
ID  - TRSPY_1984_165_a15
ER  -