%0 Journal Article %A Jakubík, Ján %A Černák, Štefan %T On convex linearly ordered subgroups of an $h\ell $-group %J Mathematica slovaca %D 2000 %P 127-133 %V 50 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MASLO_2000__50_2_a2/ %G en %F MASLO_2000__50_2_a2