@article{etna_vol33_pp17-30, author = {M. Bellalij and Y. Saad and H. Sadok}, title = {Analysis of some Krylov subspace methods for normal matrices via approximation theory and convex optimization}, journal = {Electron. Trans. Numer. Anal.}, volume = {33}, year = {2008-2009}, pages = {17--30}, }