@article{ZNSL_2000_268_a3,
     author = {L. Yu. Kolotilina},
     title = {Lower bounds for the {Perron} root of a~sum of nonnegative matrices},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {49--71},
     publisher = {mathdoc},
     volume = {268},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2000_268_a3/}
}