%0 Journal Article %A Ježek, Jaroslav %A Newrly, Norbert %A Tůma, Jiří %T Remarks on equational theories of semilattices with operators %J Commentationes Mathematicae Universitatis Carolinae %D 1990 %P 415-425 %V 31 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_1990__31_3_a2/ %G en %F CMUC_1990__31_3_a2