@article{ETNA_2001__12__a6,
     author = {Varga, Richard S.},
     title = {Ger\v{s}gorin-type eigenvalue inclusion theorems and their sharpness},
     journal = {Electronic transactions on numerical analysis},
     pages = {113--133},
     publisher = {mathdoc},
     volume = {12},
     year = {2001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ETNA_2001__12__a6/}
}