%0 Journal Article %A Černák, Štefan %T The Cantor Extension of a Lexicographic Product of $l$-Groups %J Mathematica slovaca %D 1973 %P 97-102 %V 23 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MASLO_1973__23_2_a0/ %G en %F MASLO_1973__23_2_a0