@article{ZNSL_2021_504_a0,
     author = {Yu. A. Al'pin and I. V. Bashkin},
     title = {Nonnegative chainable matrices and {Kolmogorov's} condition},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {5--20},
     publisher = {mathdoc},
     volume = {504},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2021_504_a0/}
}