@article{NUMA_1992__61_3_133621,
     author = {Ji-guang Sun},
     title = {On condition numbers of a nondefective multiple eigenvalue.},
     journal = {Numerische Mathematik},
     pages = {265--276},
     publisher = {mathdoc},
     volume = {61},
     number = {3},
     year = {1992},
     zbl = {0754.15014},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1992__61_3_133621/}
}