@article{DAN_1973_211_1_a4,
     author = {L. M. Br\`egman},
     title = {Some properties of nonnegative matrices and their permanents},
     journal = {Doklady Akademii Nauk},
     pages = {27--30},
     publisher = {mathdoc},
     volume = {211},
     number = {1},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1973_211_1_a4/}
}