%0 Journal Article %A Piet Borst %T On weakly infinite-dimensional subspaces %J Fundamenta Mathematicae %D 1991 %P 225-235 %V 140 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-140-3-225-235/ %R 10.4064/fm-140-3-225-235 %G en %F 10_4064_fm_140_3_225_235