TY - JOUR AU - Benabdallah, K. AU - Charles, B. AU - Mader, A. TI - Vertical Subgroups of Primary Abelian Groups JO - Canadian journal of mathematics PY - 1991 SP - 3 EP - 18 VL - 43 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1991-001-0/ DO - 10.4153/CJM-1991-001-0 ID - 10_4153_CJM_1991_001_0 ER -