%0 Journal Article %A A. Alexiewicz %A W. Orlicz %T Some remarks on the existence and uniqueness of solutions of the hyperbolic equation ∂²z/(∂x∂y)=f(x,y,x,∂z/∂x,∂z/∂y) %J Studia Mathematica %D 1955 %P 201-215 %V 15 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-15-2-201-215/ %R 10.4064/sm-15-2-201-215 %G en %F 10_4064_sm_15_2_201_215