%0 Journal Article %A B. Palczewski %T On uniqueness and successive approximations in the Darboux problem for the equation $u_{xy} = f(x, y, u, u_x, u_y, ∫^x_0 ∫^y_0 g(x, y, s, t, u(s, t), u_s(s, t), u_t(s, t)) ds dt)$ %J Annales Polonici Mathematici %D 1965 %P 1-11 %V 17 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-17-1-1-11/ %R 10.4064/ap-17-1-1-11 %G en %F 10_4064_ap_17_1_1_11