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@article{IVM_1999_11_a8, author = {R. Zh. Aleev and G. A. Panina}, title = {The units of cyclic groups of orders~7 and~9}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {81--84}, publisher = {mathdoc}, number = {11}, year = {1999}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1999_11_a8/} }
R. Zh. Aleev; G. A. Panina. The units of cyclic groups of orders~7 and~9. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 11 (1999), pp. 81-84. http://geodesic.mathdoc.fr/item/IVM_1999_11_a8/