%0 Journal Article %A A. Adamus-Kulczycka %T Global existence for non-linear partial differential equations of the first order %J Annales Polonici Mathematici %D 1972 %P 257-264 %V 27 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-27-3-257-264/ %R 10.4064/ap-27-3-257-264 %G en %F 10_4064_ap_27_3_257_264