%0 Journal Article %A Yu. L. Ershov %T Abstract class field theory (a~finitary approach) %J Sbornik. Mathematics %D 2003 %P 199-223 %V 194 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_2003_194_2_a1/ %G en %F SM_2003_194_2_a1