@article{ZVMMF_1977_17_3_a19,
     author = {Pham Van At},
     title = {Isolation of the {Gershgorin} circles},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {756--759},
     publisher = {mathdoc},
     volume = {17},
     number = {3},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1977_17_3_a19/}
}