%0 Journal Article
%A M. F. Atiyah
%A R. Bott
%A L. Gårding
%T Lacunas for hyperbolic differential operators with constant coefficients.~I
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1971
%V 26
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/RM_1971_26_2_a9/
%G ru
%F RM_1971_26_2_a9