TY - JOUR AU - Danchev, P. V. TI - On countable extensions of primary abelian groups JO - Archivum mathematicum PY - 2007 SP - 61 EP - 66 VL - 43 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ARM_2007__43_1_a5/ LA - en ID - ARM_2007__43_1_a5 ER -