@article{etna_vol33_pp207-220, author = {L. Elbouyahyaoui and A. Messaoudi and H. Sadok}, title = {Algebraic properties of the block GMRES and block Arnoldi methods}, journal = {Electron. Trans. Numer. Anal.}, volume = {33}, year = {2008-2009}, pages = {207--220}, }