%0 Journal Article %A E. A. Volkov %T Approximate conformal mapping of a disk with a polygonal hole onto a ring by the block method %J Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki %D 1988 %P 835-841 %V 28 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZVMMF_1988_28_6_a5/ %G ru %F ZVMMF_1988_28_6_a5