%0 Journal Article %A Bardsley, Johnathan M. %T A nonnegatively constrained trust region algorithm for the restoration of images with an unknown blur %J Electronic transactions on numerical analysis %D 2005 %P 139-153 %V 20 %I mathdoc %U http://geodesic.mathdoc.fr/item/ETNA_2005__20__a7/ %G en %F ETNA_2005__20__a7