%0 Journal Article %A Miroslav Kratko %T On characteristic sets of a system of equivalence relations %J Colloquium Mathematicum %D 1987 %P 5-9 %V 55 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-55-1-5-9/ %R 10.4064/cm-55-1-5-9 %G en %F 10_4064_cm_55_1_5_9