@article{etna_vol18_pp137-152,
  author  = {Dario A. Bini and Francesco Daddi and Luca Gemignani},
  title   = {On the shifted QR iteration applied to companion matrices},
  journal = {Electron. Trans. Numer. Anal.},
  volume  = {18},
  year    = {2004},
  pages   = {137--152},
}