@article{ETNA_2007__26__a1,
     author = {Tich\'y, Petr and Liesen, J\"org and Faber, Vance},
     title = {On worst-case {GMRES,} ideal {GMRES,} and the polynomial numerical hull of a {Jordan} block},
     journal = {Electronic transactions on numerical analysis},
     pages = {453--473},
     publisher = {mathdoc},
     volume = {26},
     year = {2007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ETNA_2007__26__a1/}
}