TY  - JOUR
AU  - L. P. Grishchuk
AU  - M. V. Sazhin
TI  - Petrov classification of standing and traveling gravitational waves
JO  - Doklady Akademii Nauk
PY  - 1975
SP  - 72
EP  - 75
VL  - 223
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1975_223_1_a17/
LA  - ru
ID  - DAN_1975_223_1_a17
ER  -