%0 Journal Article %A A. I. Plotkin %T Isometric operators in $L^p$-spaces of analytic and harmonic functions %J Zapiski Nauchnykh Seminarov POMI %D 1972 %P 130-145 %V 30 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1972_30_a8/ %G ru %F ZNSL_1972_30_a8