%0 Journal Article
%A L. A. Sakhnovich
%T The invariance principle for generalized wave operators
%J Funkcionalʹnyj analiz i ego priloženiâ
%D 1971
%P 61-68
%V 5
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/FAA_1971_5_1_a6/
%G ru
%F FAA_1971_5_1_a6