%0 Journal Article %A A. D. Mednykh %T On semidirect products of discontinuous transformation groups %J Doklady Akademii Nauk %D 1975 %P 1016-1017 %V 225 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1975_225_5_a6/ %G ru %F DAN_1975_225_5_a6