%0 Journal Article %A Palle E.T. Jorgensen %T On Optimal Spectral Estimator for Multi-Dimensional Time Series with an Infinite Number of Sample Points. %J Mathematische Zeitschrift %D 1983 %P 381-398 %V 183 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZ_1983__183_173326/ %F MZ_1983__183_173326