%0 Journal Article %A N. Gaffke %A R. Mathar %T A Cyclic Projection Algorithm Via Duality. %J Metrika %D 1989 %P 29-54 %V 36 %N 3-4 %I mathdoc %U http://geodesic.mathdoc.fr/item/MET_1989__36_3-4_176213/ %F MET_1989__36_3-4_176213