%0 Book Section
%A Abramczuk, W.
%T A remark on ellipticity of systems of linear partial differential equations with constant coefficients
%B Analytic solutions of partial differential equations - Trento, 1981
%A Collectif
%S Astérisque
%D 1981
%P 117-128
%N 89-90
%I Société mathématique de France
%U http://archive.numdam.org/item/AST_1981__89-90__117_0/
%G en
%F AST_1981__89-90__117_0