%0 Journal Article %A Chajda, Ivan %A Länger, Helmut %T A note on normal varieties of monounary algebras %J Czechoslovak Mathematical Journal %D 2002 %P 369-373 %V 52 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMJ_2002__52_2_a12/ %G en %F CMJ_2002__52_2_a12