%0 Journal Article %A Pálfy, Péter Pál %T On certain congruence lattices of finite unary algebras %J Commentationes Mathematicae Universitatis Carolinae %D 1978 %P 89-95 %V 19 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_1978__19_1_a8/ %G en %F CMUC_1978__19_1_a8