%0 Journal Article %A M. Kwapisz %T On the convergence of approximate iterations for an abstract equation %J Annales Polonici Mathematici %D 1969 %P 73-87 %V 22 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-22-1-73-87/ %R 10.4064/ap-22-1-73-87 %G en %F 10_4064_ap_22_1_73_87