%0 Journal Article %A K. Urbanik %T On a class of universal algebras %J Fundamenta Mathematicae %D 1965 %P 327-350 %V 57 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-57-3-327-350/ %R 10.4064/fm-57-3-327-350 %G en %F 10_4064_fm_57_3_327_350