%0 Journal Article %A V. Tikhomirov %A A. Kochurov %T Kolmogorov-type inequalities on the whole line or half line and the Lagrange principle in the theory of extremum problems %J Eurasian mathematical journal %D 2011 %P 125-142 %V 2 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/EMJ_2011_2_3_a7/ %G en %F EMJ_2011_2_3_a7