@article{GDZPPN001184458,
title = {Convergence of the shifted QR algorithm on 3 x 3 normal matrices.},
journal = {Numerische Mathematik},
volume = {58},
year = {1990},
pages = {341-352},
zbl = {0739.65030},
url = {http://dml.mathdoc.fr/item/GDZPPN001184458}
}
Batterson, Steve. Convergence of the shifted QR algorithm on 3 x 3 normal matrices.. Numerische Mathematik, Tome 58 (1990) pp. 341-352. http://gdmltest.u-ga.fr/item/GDZPPN001184458/