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@article{IVM_1991_6_a0, author = {V. K. Bulitko}, title = {On $1/n$-hereditary sets}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {3--11}, publisher = {mathdoc}, number = {6}, year = {1991}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1991_6_a0/} }
V. K. Bulitko. On $1/n$-hereditary sets. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 6 (1991), pp. 3-11. http://geodesic.mathdoc.fr/item/IVM_1991_6_a0/