%0 Journal Article %A E. Pfeifer %T Discrete convergence of the approximations obtained by the multi-step method for the solutions of non-linear second-order boundary value problems %J Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki %D 1978 %P 574-581 %V 18 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZVMMF_1978_18_3_a4/ %G de %F ZVMMF_1978_18_3_a4