@article{MZ_1983__183_173326,
     author = {Palle E.T. Jorgensen},
     title = {On {Optimal} {Spectral} {Estimator} for {Multi-Dimensional} {Time} {Series} with an {Infinite} {Number} of {Sample} {Points.}},
     journal = {Mathematische Zeitschrift},
     pages = {381--398},
     publisher = {mathdoc},
     volume = {183},
     year = {1983},
     zbl = {0501.49005},
     url = {http://geodesic.mathdoc.fr/item/MZ_1983__183_173326/}
}