@article{DAN_1990_310_3_a4,
     author = {A. V. Kostochka},
     title = {Maximal capacity of the boundary of the {Sperner} family},
     journal = {Doklady Akademii Nauk},
     pages = {536--538},
     publisher = {mathdoc},
     volume = {310},
     number = {3},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1990_310_3_a4/}
}