@article{DAN_1975_225_5_a6,
     author = {A. D. Mednykh},
     title = {On semidirect products of discontinuous transformation groups},
     journal = {Doklady Akademii Nauk},
     pages = {1016--1017},
     publisher = {mathdoc},
     volume = {225},
     number = {5},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1975_225_5_a6/}
}