%0 Journal Article %A Demontis, Francesco %A der Mee, Cornelis van %T Wave Operators for Defocusing Matrix Zakharov-Shabat Systems with Pnonvanishing at Infinity %J Serdica Mathematical Journal %D 2010 %P 265-284 %V 35 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/SMJ2_2010_35_3_a5/ %G en %F SMJ2_2010_35_3_a5