@article{DANMA_2021_499_a8,
     author = {Ph. A. Pushnyakov and A. M. Raigorodskii},
     title = {Estimate of the number of edges in subgraphs of a {Johnson} graph},
     journal = {Doklady Rossijskoj akademii nauk. Matematika, informatika, processy upravleni\^a},
     pages = {40--43},
     publisher = {mathdoc},
     volume = {499},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DANMA_2021_499_a8/}
}