%0 Journal Article %A Sleijpen, Gerard L.G. %A Fokkema, Diederik R. %T BiCGstab($l$) for linear equations involving unsymmetric matrices with complex spectrum %J Electronic transactions on numerical analysis %D 1993 %P 11-32 %V 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/ETNA_1993__1__a5/ %G en %F ETNA_1993__1__a5