%0 Journal Article %A Dariusz Miklaszewski %T An Application of the Stiefel–Whitney Classes to the Proof of a Fixed Point Theorem for Set-Valued Mappings %J Bulletin of the Polish Academy of Sciences. Mathematics %D 2005 %P 181-186 %V 53 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ba53-2-7/ %R 10.4064/ba53-2-7 %G en %F 10_4064_ba53_2_7