TY - JOUR AU - Šmarda, Bohumil TI - Inner product in $l$-groups JO - Communications in Mathematics PY - 2000 SP - 89 EP - 95 VL - 08 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/COMIM_2000__8_1_a8/ LA - en ID - COMIM_2000__8_1_a8 ER -