%0 Journal Article %A David Marker %T An analytic equivalence relation not arising from a Polish group action %J Fundamenta Mathematicae %D 1988 %P 225-228 %V 130 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-130-3-225-228/ %R 10.4064/fm-130-3-225-228 %G en %F 10_4064_fm_130_3_225_228