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@article{IVM_1977_3_a6, author = {A. L. Onishchik}, title = {Extensions of transitive transformation groups}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {53--65}, publisher = {mathdoc}, number = {3}, year = {1977}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1977_3_a6/} }
A. L. Onishchik. Extensions of transitive transformation groups. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 3 (1977), pp. 53-65. http://geodesic.mathdoc.fr/item/IVM_1977_3_a6/