TY - JOUR AU - Wójtowicz, Marek TI - An elementary proof of a theorem on sublattices of finite codimension JO - Commentationes Mathematicae Universitatis Carolinae PY - 1998 SP - 99 EP - 100 VL - 39 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CMUC_1998__39_1_a10/ LA - en ID - CMUC_1998__39_1_a10 ER -