%0 Journal Article %A J.H. Wilkinson %T On Neighbouring Matrices with Quadratic Elementary Divisors. %J Numerische Mathematik %D 1984 %P 1-22 %V 44 %I mathdoc %U http://geodesic.mathdoc.fr/item/NUMA_1984__44_132914/ %F NUMA_1984__44_132914