%0 Journal Article %A Andrzej Pelczar %T A local version of the generalized retract theorem of Ważewski with applications in the theory of partial differential equations of first order %J Annales Polonici Mathematici %D 1979 %P 11-28 %V 36 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-36-1-11-28/ %R 10.4064/ap-36-1-11-28 %G en %F 10_4064_ap_36_1_11_28