%0 Journal Article %A RegiƄska, Teresa %T Superconvergence of external approximation for two-point boundary problems %J Applications of Mathematics %D 1987 %P 25-36 %V 32 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/AM.1987.104233/ %R 10.21136/AM.1987.104233 %G en %F 10_21136_AM_1987_104233