%0 Journal Article %A Gabriyelyan, S. S. %T On characterized subgroups of Abelian topological groups $X$ and the group of all $X$-valued null sequences %J Commentationes Mathematicae Universitatis Carolinae %D 2014 %P 73-99 %V 55 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_2014__55_1_a6/ %G en %F CMUC_2014__55_1_a6