%0 Journal Article %A Miodrag Sokić %T Relational quotients %J Fundamenta Mathematicae %D 2013 %P 189-220 %V 221 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm221-3-1/ %R 10.4064/fm221-3-1 %G fr %F 10_4064_fm221_3_1