%0 Journal Article %A S. V. Bochkarev %T An abstract Kolmogorov theorem, and an~application to metric spaces and topological groups %J Sbornik. Mathematics %D 2018 %P 1575-1602 %V 209 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_2018_209_11_a1/ %G en %F SM_2018_209_11_a1