%0 Journal Article %A Jakubíková-Studenovská, Danica %T Retract irreducibility of monounary algebras %J Czechoslovak Mathematical Journal %D 1999 %P 363-390 %V 49 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMJ_1999__49_2_a12/ %G en %F CMJ_1999__49_2_a12