@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/