%0 Journal Article %A Ďurikovič, Vladimír %T On the uniqueness of solutions and the convergence of successive approximations in the Darboux problem for certain differential equations of the type $u_{xy}=f(x,y,u,u_x,u_y)$ %J Archivum mathematicum %D 1968 %P 223-235 %V 04 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/ARM_1968__4_4_a3/ %G en %F ARM_1968__4_4_a3