%0 Journal Article %A Stanisław Balcerzyk %A Jan Mycielski %T On faithful representations of free products of groups %J Fundamenta Mathematicae %D 1961 %P 63-71 %V 50 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-50-1-63-71/ %R 10.4064/fm-50-1-63-71 %G en %F 10_4064_fm_50_1_63_71