@article{PDMA_2015_8_a46,
     author = {V. N. Salii},
     title = {The {Sperner} property for trees},
     journal = {Prikladnaya Diskretnaya Matematika. Supplement},
     pages = {124--127},
     publisher = {mathdoc},
     number = {8},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDMA_2015_8_a46/}
}