@article{IVM_2021_9_a7,
     author = {Yu. A. Al'pin and V. G. Tregubov},
     title = {Combinatorial structure of a semigroup of bistochastic matrices},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {80--85},
     publisher = {mathdoc},
     number = {9},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2021_9_a7/}
}