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@article{DM_1989_1_4_a7, author = {I. P. Chukhrov}, title = {Maximal cardinality of the shadow of an antichain}, journal = {Diskretnaya Matematika}, pages = {78--85}, publisher = {mathdoc}, volume = {1}, number = {4}, year = {1989}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DM_1989_1_4_a7/} }
I. P. Chukhrov. Maximal cardinality of the shadow of an antichain. Diskretnaya Matematika, Tome 1 (1989) no. 4, pp. 78-85. http://geodesic.mathdoc.fr/item/DM_1989_1_4_a7/