%0 Journal Article %A C. Carstensen %T Inclusion of the roots of a polynomial based on Gerschgorin's theorem. %J Numerische Mathematik %D 1991 %P 349-360 %V 59 %N 8 %I mathdoc %U http://geodesic.mathdoc.fr/item/NUMA_1991__59_8_133554/ %F NUMA_1991__59_8_133554