%0 Journal Article %A P. A. Biluta %T Some extremal problems in the class of mean quasiconformal mappings %J Doklady Akademii Nauk %D 1964 %P 503-505 %V 155 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1964_155_3_a2/ %G ru %F DAN_1964_155_3_a2