%0 Journal Article %A G. Ts. Tumarkin %A S. Ya. Khavinson %T Properties of extremum functions in extremum problems for certain classes of analytic functions with a weighed metric %J Doklady Akademii Nauk %D 1958 %P 215-218 %V 119 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1958_119_2_a4/ %G ru %F DAN_1958_119_2_a4