%0 Journal Article %A Neytcheva, Maya %A BÃĪngtsson, Erik %T Preconditioning of nonsymmetric saddle point systems as arising in modelling of viscoelastic problems %J Electronic transactions on numerical analysis %D 2008 %V 29 %I mathdoc %U http://geodesic.mathdoc.fr/item/ETNA_2008__29__a1/ %G en %F ETNA_2008__29__a1