%0 Journal Article %A M. B. Levin %T An estimate for the derivative of a meromorphic function on the boundary of a region %J Doklady Akademii Nauk %D 1974 %P 495-497 %V 216 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1974_216_3_a6/ %G ru %F DAN_1974_216_3_a6