%0 Journal Article
%A L. P. Grishchuk
%A M. V. Sazhin
%T Petrov classification of standing and traveling gravitational waves
%J Doklady Akademii Nauk
%D 1975
%P 72-75
%V 223
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1975_223_1_a17/
%G ru
%F DAN_1975_223_1_a17