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@article{IVM_1959_6_a24, author = {G. A. Freiman}, title = {The addition of finite {sets.~I}}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {202--213}, publisher = {mathdoc}, number = {6}, year = {1959}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1959_6_a24/} }
G. A. Freiman. The addition of finite sets.~I. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 6 (1959), pp. 202-213. http://geodesic.mathdoc.fr/item/IVM_1959_6_a24/