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@article{NUMA_1991__60_4_133604, author = {D. Hinrichsen and A.J. Pritchard}, title = {On spectral variations under bounded real matrix perturbations.}, journal = {Numerische Mathematik}, pages = {509--524}, publisher = {mathdoc}, volume = {60}, number = {4}, year = {1991}, zbl = {0747.65021}, url = {http://geodesic.mathdoc.fr/item/NUMA_1991__60_4_133604/} }
D. Hinrichsen; A.J. Pritchard. On spectral variations under bounded real matrix perturbations.. Numerische Mathematik, Tome 60 (1991) no. 4, pp. 509-524. http://geodesic.mathdoc.fr/item/NUMA_1991__60_4_133604/