%0 Journal Article %A Šmarda, Bohumil %T Inner product in $l$-groups %J Communications in Mathematics %D 2000 %P 89-95 %V 08 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/COMIM_2000__8_1_a8/ %G en %F COMIM_2000__8_1_a8