%0 Journal Article
%A Tadeusz Rumak
%T Estimation of functions by means of the first order partial differential inequalities
%J Annales Polonici Mathematici
%D 1972
%P 61-71
%V 26
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/ap-26-1-61-71/
%R 10.4064/ap-26-1-61-71
%G en
%F 10_4064_ap_26_1_61_71