%0 Journal Article
%A S. Bal
%T Smoothness of solutions for a system of first order non-linear partial differential equations
%J Annales Polonici Mathematici
%D 1970
%P 41-48
%V 23
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/ap-23-1-41-48/
%R 10.4064/ap-23-1-41-48
%G en
%F 10_4064_ap_23_1_41_48