Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1958_4_a6, author = {Gu Chao-hao}, title = {On reducibility of infinite groups of {Cartan} mappings}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {60--66}, publisher = {mathdoc}, number = {4}, year = {1958}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1958_4_a6/} }
Gu Chao-hao. On reducibility of infinite groups of Cartan mappings. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 4 (1958), pp. 60-66. http://geodesic.mathdoc.fr/item/IVM_1958_4_a6/