TY - JOUR AU - Žembery, Ivan TI - The Embedding of Some Lattices into Lattices of All Subgroups of Free Groups JO - Mathematica slovaca PY - 1973 SP - 103 EP - 105 VL - 23 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MASLO_1973__23_2_a1/ LA - en ID - MASLO_1973__23_2_a1 ER -