@article{ZNSL_2015_439_a1,
     author = {Yu. A. Al'pin and V. S. Al'pina},
     title = {Combinatorial and spectral properties of semigroups of stochastic matrices},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {13--25},
     publisher = {mathdoc},
     volume = {439},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2015_439_a1/}
}