%0 Journal Article
%A Peter D. Lax
%T On Cauchy's problem for hyperbolic equations and the differentiability of solutions of elliptic equations
%J Matematika
%D 1957
%P 43-59
%V 1
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MAT_1957_1_1_a3/
%G ru
%F MAT_1957_1_1_a3