%0 Journal Article %A N. K. Nikol'skii %T The multiple shift operator with simple spectra %J Zapiski Nauchnykh Seminarov POMI %D 1970 %P 227-236 %V 19 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1970_19_a10/ %G ru %F ZNSL_1970_19_a10