@article{ETNA_2009__33__a11,
     author = {Bellalij,  M. and Saad,  Y. and Sadok,  H.},
     title = {Analysis of some {Krylov} subspace methods for normal matrices via approximation theory and convex optimization},
     journal = {Electronic transactions on numerical analysis},
     year = {2009},
     volume = {33},
     zbl = {1171.65019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ETNA_2009__33__a11/}
}