%0 Journal Article %A Mach, Thomas %A Pranić, Miroslav S. %A Vandebril, Raf %T Computing approximate extended Krylov subspaces without explicit inversion %J Electronic transactions on numerical analysis %D 2013 %P 414-435 %V 40 %I mathdoc %U http://geodesic.mathdoc.fr/item/ETNA_2013__40__a3/ %G en %F ETNA_2013__40__a3