%0 Journal Article %A Valentin Gutev %T Closed graph multi-selections %J Fundamenta Mathematicae %D 2011 %P 85-99 %V 211 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm211-1-5/ %R 10.4064/fm211-1-5 %G en %F 10_4064_fm211_1_5