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@article{IVM_1976_3_a12, author = {N. I. Zhukova}, title = {A~category of reducible two-sheeted structures}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {103--105}, publisher = {mathdoc}, number = {3}, year = {1976}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1976_3_a12/} }
N. I. Zhukova. A~category of reducible two-sheeted structures. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 3 (1976), pp. 103-105. http://geodesic.mathdoc.fr/item/IVM_1976_3_a12/