%0 Journal Article
%A V. M. Manuilov
%T An Invariant of a Pair of Almost Commuting Unbounded Operators
%J Funkcionalʹnyj analiz i ego priloženiâ
%D 1998
%P 88-91
%V 32
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/FAA_1998_32_4_a12/
%G ru
%F FAA_1998_32_4_a12