%0 Journal Article %A Černák, Štefan %T Cantor extension of a mixed product of directed groups %J Mathematica slovaca %D 1976 %P 103-114 %V 26 %N 2 %U http://geodesic.mathdoc.fr/item/MASLO_1976_26_2_a4/ %G en %F MASLO_1976_26_2_a4